THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL OF TANZANIA FORM TWO NATIONAL ASSESSMENT 

031 PHYSICS

Time: 2:30 Hours Friday, 15^thNovember 2019 a.m.

Instructions 

1.  This paper consists of sections A, B and C with a total of ten (10) questions.

2.  Answer all questions.

3.  All answers must be written in the spaces provided

4.  All writing must be in blue or black ink except drawings which must be in pencil.

5.  All communication devices, calculators and any unauthorized materials are not allowed in the examination room.

6.  Write your Examination Number at the top right hand corner of every page.

7.  Where necessary the following constants may be used:

(i) Acceleration due to gravity, ³ g = 10m / s². 3 (ii) Density of water = 1g / cm or 1000kg / m .

SECTION A (30 MARKS)

1. For each of the items (i) - (xx), choose the correct answer from the given alternatives and write its letter in the box provided.

(i)  Why Physics, Chemistry and Biology are natural science subjects?

1.  They need practical and theory work for learning.
2.  They need only theory for learning.
3.  They need practical work only.
4.  They need only observation.

---

(ii)  Which of the following is a safety precaution in the Physics laboratory?

1.  Doing experiment in the laboratory
2.  Handling of apparatus in the laboratory
3.  Use equipment with care in the laboratory
4. Do anything in the laboratory

---

(iii)  Which instrument will you use to measure accurately the inside diameter of a bottle neck?

1.  tape measure.
2.  micrometer screw gauge.
3.  metre rule.
4. Vernier calipers.

---

(iv)  Which of the following statements is correct about mass?

1.  It is measured by beam balance
2.  It is measured by spring balance 
3.  It varies with place 
4.  It can be zero.

---

(v)  A hydrometer is an instrument used to measure

1.  the volume of liquids. 
2. the density of liquids.
3. the density of solids.
4. the volume of solids.

---

(vi)  When a body of mass M, is lifted through a height h, it possesses the energy known as

1.  kinetic energy. 
2. chemical energy.
3. light energy.
4. potential energy.

---

(vii)  If the angle between two plane mirrors is 60°, what will be the number of images?

1.  2 
2. 3
3. 4
4. 5

---

(viii)  The presence of charge in a material can be demonstrated by

1.  electrophorus.
2. earth wire.
3. gold leaf.
4. electroscope.

---

(ix)  A current of 0.2 A flows through a resistor of 4Ω. The potential difference across a resistor is

1.  20 V
2.  0.8 V 
3.  0.05 V 
4.  8 V

---

(x)  The process of removing magnetism from a material is known as

1.  polarization.
2. demagnetization.
3. magnetization. 
4. magnetizing.

---

(xi)  How can a real image be distinguished from a virtual image?

1. Real image is inverted while virtual image is upright
2.  Real image is upright while virtual image is inverted
3.  Virtual image is formed by a convergent rays while real image is formed by divergent rays
4.  Real image is formed by a convergent rays while virtual image is by divergent rays

---

(xii)  Why an atom is electrically neutral?

1.  It consists of equal number of electrons
2.  It consists of equal number of protons and electrons
3.  It consists of equal number of electrons and neutrons
4.  It consists of equal number of protons and neutrons

---

(xiii)  A potential difference of 12V is applied across a resistor of resistance 24 Ω. The current in a circuit is

1.  0.5 A 
2. 2 A 
3. 0.5 Ω 
4. 288 Ω

---

(xiv)  If a North pole is used in the stroking method of magnetization, the end where the stroking begins is

1.  South pole. 
2. North pole. 
3. West. 
4. East.

---

(xv) The Figure 1 shows a ruler balanced by placing the loads at its ends. What is the weight of X?

1. 5N 
2. 0.5N 
3. 100N 
4. 200N

---

(xvi)  Which of the following is an example of a third class lever?

1.  Scissors 
2. Fishing pole
3. Pliers 
4. Nut cracker

---

(xvii)  Distance between two moving objects will change if 

1. both are moving with the same velocity.
2.  both have the same acceleration.
3.  both have different acceleration.
4.  both have no acceleration.

---

(xviii)  While of the following best illustrates Newton’s third law?

1.  Inertia 
2. Momentum
3. Rocket propulsion 
4. Circular motion

---

(xix)  The temperature of a body of −40°C in Kelvin (K) scale is

1.  313 K 
2. 233 K 
3.  272 K
4.  −40 K

---

(xx)  Which of these resources of energy is non-renewable?

1.  Wave energy 
2. Biofuels
3. Radiant energy 
4. Fossil fuel

---

2. Match the items in List A with a correct response in ListB by writing a letter of a correct response below the corresponding item number in the table provided.

List A	List B
An instrument that measures length, depth, internal and external diameters. An instrument that measures volumes of liquid. An instrument that measures force of pull An instrument that transfers a specific amount of liquid from one container to another. An instrument that measures body temperature.	Measuring cylinder Pipette Vernier caliper Glass tumbler Spring balance Clinical thermometer Magdeburg experiment

---

3. Complete each of the following statements by writing the correct answer in the space provided.

(i) Basic physical proportions of measurement which cannot be obtained from any other proportions by either multiplication or division are called.

---

(ii)  Staircases, winding roads uphill, wedges and a screw are physical examples of

---

(iii)  The resistance of a body to change its state of rest is called 

---

(iv) Objects which emit light when they are hot are called 

---

(v) Materials which obey Hooke’s law are known as 

---

SECTION B (50 MARKS)

4.  (a) What do you understand by the following terms?

(i)  Work 

---

(ii)  Energy

---

(iii)  Power

---

(b)  Calculate the power of a pump which can lift 200 kg of water through a vertical height of 6 m in 10 seconds.

---

(c)  A 1000 kg car is travelling down the road at a speed of 15 m/s. How much kinetic energy does it have?

---

5.  (a) (i) Briefly explain the motion of an object under gravity by taking an example of a ball thrown straight up into the air

---

(ii) A car with a velocity of 60 km/h is uniformly retarded and brought to rest after 10 seconds. Calculate its acceleration.

---

(b)  (i) Distinguish between distance and Displacement.

---

(ii) Provide one example of the law of inertia of a body 

---

(c)  What mass will be given to a body with an acceleration of 7 m/s² by a Force of 3N?

---

6.  (a) State Pascal’s principle of pressure 

---

(b)  What are the three factors that affect the liquid pressure?

---

(c)  Calculate the area of an object if the pressure exerted is 0.2 N/m² and its force is 2 N.

---

7.  (a) Light is a form of energy. State any two characteristics of it which can be distinguished from other forms of energy.

---

(b)  With the aid of a diagram, state the laws of reflection.

---

(c)  How many images can be formed if two mirrors are set?

(i)  At an angle of 60°

(ii)  Parallel to each other.

---

8.  (a) State the principle of moments.

---

(b)  Distinguish between stable equilibrium and unstable equilibrium.

---

.(c)  A metre rule is pivoted about a point O as shown in Figure 2 and it is balanced by a load of 0.2 N.

Calculate the mass of the rule.

---

SECTION C (20 MARKS)

9.  (a) What are the uses of the following devices?

(i)  Manometer 

(ii)  Hare’s apparatus (inverted U-tube)

(iii)  U-tube 

(iv)  Barometer 

---

(b) Why a big Elephant manages to walk comfortably in muddy soil without sinking while a human being may sink easily?

---

(c) Draw a well labeled diagram which demonstrates that liquid pressure depends on depth.

---

10.  (a) Mention three uses of current electricity

---

(b) Why is it advised to connect bulbs in parallel arrangement during installation of electricity in most buildings?

---

(c) Form one students at Saku Secondary School who were conducting an experiment to verify Ohm's Law in the laboratory, were given the following instructions: Connect in series a resistor R, a battery B of two cells, a switch K, an ammeter A and rheostat S. Then connect a voltmeter V across resistor R. Draw a well labelled circuit representing this experiment.

---

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2018

SECTION A

(i)Any substance that has mass and occupies space is known as:

1. energy.
2. matter.
3. universe.
4. nature.

---

ii) A set of techniques used by scientists to investigate a problem refers to:

1. data interpretation.
2. scientific method.
3. performing an experiment
4. data presentation.

---

(iii)A vernier caliper is used to measure:

1. distance of a car.
2. diameter of a wire.
3. mass of a car.
4. length of a table.

---

(iv)A force which prevents a body to slide is called:

1. stretching force.
2. restoring force.
3. frictional force.
4. compressional force.

---

(v)The ability of a body to float in a fluid is known as:

1. the law of upthrust.
2. the law of Archimedes
3. the law of floatation.
4. floating.

---

(vi)One of the following is the condition for a body to float in water:

1. The mass of a floating body is greater than displaced water.
2. The density of the body must be less than the density of the fluid.
3. The upthrust due to the liquid must be smaller than the weight of the body.
4. The displaced water is less than the floating body.

---

(vii)In a solid state the force of attraction between molecules is greater because particles are:

1. closely packed together.
2. somehow apart.
3. not closely packed together.
4. moved so randomly.

---

(viii)The phenomenon observed when maize flour is poured on top of water is called:

1. diffusion. 
2.  capillarity.
3. surface tension.
4. osmosis.

---

(ix)Density and height are factors which affect pressure in:

1. solid.
2. solid and liquid.
3. liquid.
4. gas.

---

(x)When a body is performing a work, it is said to have:

1. moment.
2. energy.
3. momentum
4. work.

---

(xi)Which of the following unit could be used for kinetic energy?

1. Kg
2. N
3. Js
4. NM

---

(xii)Materials that allow only part of light to pass through them are called:

1. transparent.
2. translucent.
3. opaque. 
4.  Newton.

---

(xiii)What term refers to the stationary accumulation of charges on an object?

1. Current electricity
2. Static electricity
3. Charging.
4. Polarization.

---

(xiv)The flow of electrons in a material is called:

1. charging.
2. potential difference
3. electric current.
4. resistivity.

---

(xv)Which of the following materials can be magnetized strongly?

1. Nickel and copper
2. Steel and Brass
3. Cobalt and Iron
4. Cobalt and Copper

---

(xvi)The point where the force of gravity can be considered to act is called:

1. centre of gravity.
2. centre of mass.
3. centre of weight.
4. equilibrium.

---

(XVii) The rate of change of velocity of a body is known as:

1. uniform speed.
2. acceleration.
3. distance.
4. displacement.

---

(XViii)Why is the mechanical advantage less than three in a single rope three pulleys system?

1. Because the effort may vary.
2. Because the load rises.
3. Because the upper pulley does not move
4. Due to friction on pulleys.

---

(xix)The product of mass of a body and its acceleration is a result of:

1. Newtons second law of motion
2. Law of inertia.
3. Newtons third law of motion.
4. Momentum change.

---

(xx)A form of energy that can be persistently used without running out is

1. Efficient
2. renewable
3. non-renewable
4. effective

---

2.Match the items in List A with a correct response in List B by writing a letter of the correct response below the number of the corresponding item In List A in the table provided.

List A	List B
(i) The force used to operate a machine (ii)An example of 3rd class lever. (iii)Ratio of number of teeth in a driven wheel to the number of teeth in driving wheel,  (iv) The force that causes the efficiency of a machine to be less than 100%. (v) It is used to lift heavy weights using a small effort.	Knife. Lever.  Inclined planes. Friction Wheelbarrow  Effort. Velocity ratio.

---

3.Complete each of the following statements by writing the correct answer in the space provided.

 (i) Mass of a body is defined as ..

(ii)The resultant of a force which overcomes resistance refers to 

(iii)A force which produces an acceleration of 1m/s² in a mass of Ikg is called

(iv)The proper term for a light which passes through different media is

 (v) A point just after elastic limit is called 

---

SECTION B

4.(a) State two conditions for a body to be in equilibrium.

(b) Distinguish between centre of mass and centre of gravity.

(c) A uniform metre rule AB is balanced horizontally on a knife edge placed 5cm from B with a mass of 60g at B. Find the mass of the ruler.

---

5.(a)What is energy?

(b) Mention any four types of energy.

(c) A minibus of mass of one and a half tonnes is moving with kinetic energy of 30000J. What is its velocity in Km/h?

---

6.(a) List down four uses of hydraulic press.

(b) Why is a hole at the bottom of a ship more dangerous than one that is near the surface?

(c) Calculate the pressure at the bottom of the sea water 52m deep, if the density of water is 1025 Kg/m³. Take the acceleration due to gravity (g) as ION/Kg.

---

7.(a)What is meant by acceleration?

(b) In which case is acceleration said to be uniform?

(c) A car with a velocity of 90km/h is uniformly retarded and brought to rest after 10 seconds. Calculate its acceleration.

---

8.(a) Define the following terms as applied in Physics:

(i)Machine

(ii)Load

(b) Why is efficiency of machine less than 100%? Explain briefly.

(c) Simple machine was used to raise a load of weight 4000 N through a height of 0.8 m using an effort of 800 N. If the distance moved by effort was 4.8 m, calculate the: (i) Mechanical advantage. (ii) Velocity ratio.

---

_{SECTION C}

9. (a)A water can has three holes punched - the first at the bottom, the second at the middle and the third hole almost at the top. If water is filled in the can, how will the water spurt through the bottom and the top holes?

 (b) (i) Why is it easier to cut a piece of meat with a sharp knife than a blunt knife?

(ii) The tip of a needle of hypodermic syringe has a cross-sectional area of 1 x 10 -6 m². If a doctor applies a force of 120 N to a syringe that is connected to the needle, what is the pressure exerted at the tip of the needle?

(c) The small piston of a hydraulic press has an area of 3.0 x 10 -4 m² and the bigger piston has an area of 2.0 x 10-2 m² . The two pistons are in the same level. If the force of 120 N is applied to the small piston, calculate the force required to be applied to the bigger piston to stop it moving.

---

10. (a) Define the word coulomb.

(b) States Ohms law.

(c) Two resistors of 30 and 60 are connected in parallel to a 3V battery.

(i)Draw the schematic diagram.

(ii)Find the effective resistance of the circuit.

(iii)Calculate the current passing through the 60 resistor.

---

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2017

SECTION A

(i)Physics, Chemistry and Biology are natural science subjects which need: 

1. practical and theory work for learning
2. only theory for learning
3. practical work only
4. only observation.

---

(ii) Which of the following is a safety precaution in the Physics laboratory? 

1. Doing experiment in the laboratory
2. Handling of apparatus in the laboratory
3. Use equipmentwith care in the laboratory
4. Do anything in the laboratory.

---

(iii)Which instrument will you use to measure accurately the inside diameter of a bottle neck?

1. Tape measure
2. Micrometer screw gauge
3. Meter rule
4. Vernier calipers

---

(iv)Which of the following statements is correct about mass?

1. It is measured by beam balance
2. It is measured by spring balance
3. It varies with place
4. It can be zero

---

(v)A hydrometer is an instruments used to measure:

1. the volume of liquids
2. the density of liquids
3. the density of solids
4. the volume of solids

---

(vi)When a body of mass M is lifted through a height h, it possesses the energy known as:

1. kinetic energy
2. chemical energy
3. light energy
4. potential energy

---

(vii)If the angle between two plane mirrors is 60 ⁰, then the number of images will be:

1. 2
2. 3
3. 4
4. 5

---

(viii)The presence of charge in a material can be demonstrated by:

1. electrophorus
2. earth wire
3. gold leaf
4. electroscope

---

(ix)What is the potential difference across a 4 resistor if a current of 0.2A flows through it?

1. 20V
2. 0.8V
3. 0.05V
4. 8V

---

(x)The process of removing magnetism from a material is known as:

1. polarization.
2. demagnetization
3. magnetization.
4. magnetizing.

---

(xi)How can a real image be distinguished from a virtual image?

1. Real image is inverted while virtual image is upright.
2. Real image is upright while virtual image is inverted.
3. Virtual image is formed by convergent rays while real image is formed by divergent rays.
4. Real image is formed by convergent rays while virtual image is formed by divergent rays.

---

(xii)Why is an atom electrically neutral?

1. It consists of equal number of electrons
2. It consists of equal number of protons and electrons.
3. It consists of equal number of electrons and neutrons.
4. It consists of equal number of protons and neutrons.

---

(xiii)A potential difference of 12V is applied across a resistor of resistance 24 0. The current in a circuits is:

1. 0.5A
2. 2A
3. 0.5?
4. 288?

---

(xiv)If a North pole is used in the stroking method of magnetization, the end where the stroking begins is:

1. South pole 
2. North pole 
3. West
4.  East.

---

(xv)Figure 1 shows a ruler balanced by placing the loads at its ends. What is the weight X?

Figure 1

1. 5N
2. 0.5N
3.  IOON 
4.  200N

---

(xvi)Which of the following is an example of a third class lever?

1. Scissors
2. Fishing pole
3. Pliers
4. Nut cracker

---

(xvii)Distance between two moving objects will change if:

1. both are moving with same velocity.
2. both have the same acceleration.
3. both have different acceleration.
4. both have no acceleration.

---

(xviii)Which of the following best illustrates Newtons third law?

1. Inertia
2. Momentum
3. Rocket propulsion
4. Circular motion

---

(xix)The temperature of a body of -40⁰C in Kelvin (K) scale is:

1.  313K 
2.  233K 
3.  273K 
4.  -40K

---

(xx) Which of these resources of energy is non-renewable?

1. Wave energy
2. Bio fuels
3. Radiant energy
4. Fossil fuel

---

2.Match each item in List A with a correct response in List B by writing the letter of the correct response below the number of the corresponding item in List A in the table provided

LIST A	LIST B
(i)An instrument that measures length, depth, internal and external diameters. (ii)An instrument that measures volumes of liquid. (iii)An instrument that measures force or pull. (iv)An instrument that is used to transfer specific amounts of liquids from one container to another. (v)An instrument that measures body temperature.	Measuring cylinder.  Pipette Vernier calipers Glass tumbler Spring balance Clinical thermometer Magdeburg experiment

---

3.Complete each of the following statements by writing the correct answer in the space provided.

(i)Basic physical proportions of measurement which cannot be obtained from any other proportions by either multiplication or division are called. ...

(ii)Staircases, winding roads uphill, wedges and a screw are physical examples of .....

(iii)The resistance of a body to change its state of rest is called ....

(iv)Objects that emit light when they are hot are called ....

(v) Materials which do not obey Hookes law are known as ......

---

SECTION B

4.What do you understand by the following terms?

(i) Work 

(ii) Energy 

(iii) Power 

(b) Calculate the power of a pump which can lift 200kg of water through a vertical height of 6m in 10 seconds, given g =10m/s².

(c) Explain the meaning of the following terms:

(i)Kilowatt . 

(ii)Kilojoules . 

---

5.(a) (i) What is acceleration?

(ii) A car with a velocity of 60km/h is uniformly retarded and brought to rest after 10 seconds. Calculate its acceleration.

(b) (i) Distinguish between distance and displacement.

(ii) Provide one example of the law of inertia of a body.

(c)What is the mass of a body which when acted on by a force of 3N accelerates at 7m/s².

---

6.State Pascals principle of pressure

(b)What are the three factors that affect the liquid pressure?

(c) Calculate the area of a surface of an object which exerts a pressure of

0.2N/m² when a force acting on it is 2N.

---

7.Define the term light.

(b) By aid of a diagram state the laws of reflection.

(c)How many images can be formed if two mirrors are set:

(i)At angle of 60 ⁰?

(ii)Parallel to each other?

---

8.(a) State the principle of moments.

(b) Distinguish between stable equilibrium and unstable equilibrium.

(c) A metre rule is pivoted about a point O as shown in Figure 2 and it is balanced by a load of 0.2N.

Calculate the mass of the rule.

---

9.(a) What are the uses of the following devices?

(i)Manometer

(ii)Heres apparatus (inverted U-tube) 

(iii) U-tube ....

(iv) Barometer 

(b) Explain why a big elephant manages to walk comfortably in maddy soil without sinking while a human being may sink easily.

(c) Draw a well labelled diagram which demonstrates that liquid pressure depends on depth.

---

10.(a) Mention three uses of current electricity.

(b) Explain why it is advised to connect bulbs in parallel arrangement during installation of electricity in most buildings.

(c) Form One students at Saku Secondary School who are conducting an experiment to verify Ohms law in the laboratory, were given the following instructions: Connect in series a resistor R, a battery B of two cells, a switch K, an ammeter A and rheostat S. Then connecta voltmeter V across resistor R. Draw a well labelled circuit representing this experiment.

---

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2016

SECTION A

(i)Results obtained from Physics experiment can form:

1. Scientific laws
2. Scientific Principles
3. Scientific Theories
4. Scientific Procedures

---

(ii)Which of the following are used to stop fire?

1. Matches
2. Extinguishers
3. Fuels
4. Brushes

---

(iii)If a micrometer screw gauge reads 5.0mm and 0.95mm for sleeve and thimble respectively, the length of object will be:

1. 5.95mm
2. 59.5mm
3. 0.595mm
4. 0.0595mm

---

(iv)The force which exists between two close bar magnets with like poles is known as:

1. attractive
2. repulsive
3. friction
4. compressional

---

(v)Buouyant force is mainly determined by;

1. volume and density
2. volume and mass
3. weight and mass
4. weight and density

---

(vi) which one is an example of force?

1. weight
2. mass
3. atom
4. magnet

---

(vii) Apparent loss in weight is known as;

1. upthrust
2. apparent weight
3. pressure
4. weight

---

(viii)An upthrust experienced by the body which weighs 5.0N in air and 3.2N when it is completely immersed in a liquid is;

1. O.4N
2. . O.6N
3. 1.6N
4. 1.8N

---

(ix)A physical phenomenon observed when a tea bag is dropped into a cup of hot water is called:

1. diffusion
2. capillarity
3. osmosis
4. solution

---

(x)The walls of a dam are made thicker at the bottom than at the top because the:

1. pressure of water at the bottom is greater
2. pressure of water at the bottom is less
3. weight of water at the bottom is greater
4. weight of water at the bottom is less.

---

(xi)How can you distinguish a lever from a pulley?

1. A lever turns on pivot while a pulley turns on an axle
2. A lever changes direction of applied effort while a pulley does not.
3. M.A. of a lever is effort arm over load arm while M.A. of a pulley is R/r
4. V.R of a lever is 2nr/P while that of a pulley is (R/r)² 

---

(xii)The term displacement means:

1. a distance covered in a given direction
2. a distance covered without direction
3. a rate of distance
4. a rate of velocity

---

(xiii)Which of the following is the most closely related to inertia?

1. Weight
2. Acceleration
3. Mass
4. Force

---

(xiv)Why is water unsuitable for a thermometer liquid?

1. It does not wet glass
2. It wets glass
3. It is opaque
4. It is a good conductor of heat.

---

(XV) The energy which is obtained from hot rocks underground is called.

1. geothermal energy .
2. solar energy
3. water energy
4. . wind energy

---

(xvi)ln Figure 1 the angle of reflection is equal to:

Figure. 1

1. 50⁰
2. 40⁰
3. 130⁰
4. 45⁰

---

(xvii) Unlike magnetic poles as well as unlike electric charges, when brought close to each other they tend to

1. attract each other
2. repel each other
3. exist in pairs
4. separate

---

(xviii)The resistance of on operating lamp rated 115 V and 0.25 A is

1. 460 ?
2. 29 ?
3. 114.75 ?
4. 230 ?

---

(xix)In which region can the north pole of a magnet be directed?

1. Towards the geographic North Pole
2. Towards the geographic South Pole
3. Along the Equatorial
4. Along the Coast of Antarctica

---

(xx)Ability of man to walk properly along a road is one of the applications of

1. stable equilibrium
2. unstable equilibrium
3. neutral equilibrium
4. neutral and stable equilibrium

---

2.    Match each item in List A with a correct response in List B by writing its letter below the number of the corresponding item in List A in the table provided.

LIST A	LIST B
(i)A state of balance of a body. (ii)The sum of the forces in one direction must be equal to the sum of the forces in opposite direction. (iii)A point where the force of gravity can be considered to act. (iv)The object with high centre of mass. (v)All points in a body move around a single line.	Centre of gravity Unstable equilibrium Translational motion Rotational motion Condition for equilibrium Point of application Equilibrium Stable equilibrium

---

3.Complete each of the following statements by writing the correct answer in the space provided.

(i)The relative density of a liquid can be easily determined by 

(ii)The lever, pulley, inclined plane, bottle opener and see saw are examples of 

(iii)A loaded car of mass 25,000kg is moving at 20m/s, its linear momentum is 

(iv)Laterally inverted is one of the properties of the image formed by

(v)Materials which return to their original shape and size after removing the stretching force are called 

---

4.(a) What is meant by the moment of a force about a point?

(b)Why are door handles placed at the end of the door and not at the centre of the door? 

A line of action of a force of 48N is at a perpendicular distance of 1.5m from a point. Find the moment of the force about the point.

---

5.(a) Differentiate between the following terms:

(i)Constant acceleration and constant velocity 

(ii)Momentum and impulse of a force 

(b)Explain one application of the law of inertia in everyday life

(c) How long does a car take to accelerate from rest to 30m/s if its acceleration is 4.5m/s²?

---

6.(a) Define the following terms

(i) Pressure 

(ii) Atmospheric pressure 

(b)List two factors in which pressure in liquids depends on.

(c) A rectangular tank which measures 5m by 4m contains water to a height of 10m Calculate

(i) Pressure on the base. 

(ii) Thrust on the base.

---

7.State Newtons laws of motion.

(b) Why do passengers in a car surge backward when a car starts moving and forward when it stops suddenly?

(c) A rocket expels gas at a rate of 0.5Kg/s. If the force produced by the rocket is 2000N, what is the velocity with which the gas is expelled?

---

8.(a) State Archimedes principle . 

(b)Define relative density of a solid 

(c) The mass of a density bottle is 15g. When it is fully filled with a fluid of density 1.2g/cm³, its mass is 51g. Find the volume of the bottle.

---

9.(a) Define the following terms as applied in Physics:

(i)Electric current .

(ii)Coulomb

(b)  Find the equivalent resistance if two resistors of value 5 are connected in

(i)Parallel

(ii)Series

(c) Study Figure 2 carefully and then answer the question that follows:

Calculate the values of V, VI and V2.

---

10. Study Figure 3 and then answer the questions that follow.

Figure 3

(a) Give the name of Figure 3.

(b) The machine in Figure 3 is used to lift a container weighing 100,000N. The radius of effort piston is 20 cm and the radius of load piston is 5m. If the efficiency of the machine is 90%, calculate the velocity ratio and its mechanical advantage (M.A).

---

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2015

SECTION A

(i) A beam balance is used to measure:

1.  Weight 
2. Mass
3. Volume 
4.  Density

---

(ii) Which of the following is nota form of energy?

1. Chemical 
2. Nuclear 
3.  Heat 
4. Joule

---

(iii)The speed of 72km/hr is equivalent to:

1. 120m/s
2. 1200m/s
3. 20m/s
4. 200m/s

---

(iv)To minimize zero error the pointer of the instrument should be  adjusted:

1. at zero mark
2. before zero mark
3. after zero mark
4. at the middle mark

---

(v)The region around a magnet is called:

1. magnetization
2. demagnetization
3. magnetic field
4. magnetic domains

---

(vi)The tendency of an object to fall or drop lower levels in fluid is called.

1. floating
2. sinking
3. upthrust
4. buoyant

---

(vii)The ability of a material to return to its original shape after deformation is called:

1. plasticity
2. plastic deformation
3. elastic limit
4. elasticity

---

(viii)The energy associated with areas of frequent earthquakes is known as:

1. tidal energy
2. solar energy
3. geothermal energy
4. wind energy

---

(ix)The image formed by plane mirror is always:

1. real
2. inverted
3. magnified
4. left-right reversal

---

(x)An instrument used to store electric charges is called

1. capacitance
2. capacitor
3. resistor
4. inductor

---

(xi)A huge discharge of static electric charges between two clouds is called:

1. radar
2. thunder
3. lightning
4. lightning conductor

---

(xii)Electric current is expressed as

1. quantity of charge per unit time
2. voltage per unit time
3. resistance per unit voltage
4. charge per unit voltage

---

(xiii)The pressure exerted by a force 120N over an area of 10cm² is:

1. 20000N/m².
2.  2000N/cm²
3. 12000N/m²
4. 120000N/cm²

---

(xiv)The change in momentum of an object when a force is applied to it is called:

1. inertia
2. moment
3. impulse
4. deceleration

---

(xv)Molecular forces that are exerted between molecules of the same kind are known as

1.  adhesion
2. cohesion
3. upthrust
4. surface tension

---

(xvi)The point of support about which a bar or lever turns is referred to as a

1. pointer
2. load arm
3. fulcrum
4. pulley

---

(xvii)The rate at which work is done is called:

1. energy
2. watt
3. joule per time
4. power

---

(xviii)The state of balance of a body is known as:

1. equilibrium
2. static equilibrium
3. dynamic equilibrium
4. neutral equilibrium

---

(xix)Water is unsuitable as a thermometric liquid because it .........

1. boils at 80⁰C
2. freezes at -112⁰C
3. wets glass
4. does not wet glass

---

(xx)Which of the following is a property of gravitational force?

1. It is repulsive in nature
2. It acts over a very long distance
3. It is much stronger
4. It is non-central force

---

SECTION B

2.Match each item in List A with a correct electric symbol in List B by writing its letter below the number of the corresponding item in the table provided.

LIST A	LIST B
(i)Supplies electrical energy (ii)Converts electrical energy to heat and light (iii)Impedes the flow of current (iv)Detects the presence of current (v)Measures current (vi)Stores charge (vii)Measures potential difference (viii)Opens and closes a circuit

---

3.Complete each of the following statements by writing the correct answer in the space provided.

(i)The quantity of space that an object occupies is known as 

(ii)Occurs when a bodys rate of change of displacement is constant 

(iii)A physical quantity measured by using thermometer is referred to as

(iv)Causes an object to rotate or turn about a fixed point

(v)The angle between the geographic north and the magnetic north is called 

---

4.(a)What is meant by capillary action? 

(b)Differentiate between the following terms:

(i) Magnetization and demagnetization.

(ii) Luminous and non-luminous bodies.

(iii)Regular and irregular reflection of light. Conductor and insulator.

---

5.(a)(i)Define friction.

(ii) Identify three effects of force.

(b) (i) Define density and give its SI unit.

(ii) List three applications of density in real life.

---

6.(a) What is meant by First Aid?

(b)(i)Draw the symbols or warning signs for each of the following: Irritant

(ii)Danger of an electric shock

(iii)Toxic

(iv)Flammable

---

SECTION C

7.(a) (i)Write three equations of motion.

(ii) Distinguish between elastic and inelastic collision.

(b) (i) State the principle of conservation of linear momentum.

(ii) A 4kg object is moving to the right at 2m/s when it makes a head on collision with a 5kg object moving with a velocity of 1m/s in the opposite direction. If both objects stick together after collision, calculate their common velocity.

---

8.(a) What is meant by the following terms as used in simple machines?

(i)Pitch of the screw

(ii)Velocity ratio

(b) A screw jack with a pitch of 0.1cm and a handle of length 21 cm is used to lift a car of weight 528N. If the efficiency of the screw is 20%, calculate the:

(i) Velocity ratio

(ii) Effort required to raise the car

---

9.(i)Define potential energy.

(ii) A ball of mass 0.5kg is dropped from a height of 10m and on impact with the ground it loses 30J of energy. Calculate the height it reaches on the rebound.

(iii) State the principle of conservation of energy.

(iv)Briefly describe the energy changes when the bob of a simple pendulum swings from one side to another.

---

10. (a) (i) Distinguish between a real and a virtual image.

(ii) Calculate the number of images formed between two plane mirrors placed at 60⁰.

(b) (i) List three applications of periscope in everyday life.

(ii) State two properties of the final image formed in a periscope.

---

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL

FORM TWO SECONDARY EDUCATION EXAMINATION

0031 PHYSICS Time: 2:30 Hours Friday, 28^th November 2014 a.m.

Instructions

1.  This paper consists of sections A, B, and C.
2.  Answer all questions in the spaces provided.
3.  All writing must be in blue or black ink except drawings which must be in pencil. 
4.  All communication devices and calculators are not allowed in the examination room.
5.   Write your Examination Number at the top right corner of every page.
6.   Where necessary the following constants may be used:

(i)  Acceleration due to gravity, g = 10 m/s²

(ii)  Density of water = 1 g/cm³ or 1,000 kg/m³

1. For each of the items (i) – (xx), choose the correct answer among the given alternatives and write the letter in the box provided.

An electrostatic machine which produces an unlimited supply of sparks by induction is called

(i) The study of matter in relation to energy is called:

1. Chemistry
2. Physicists
3. Biology
4. Physics

---

(ii) The force which causes tear and wear between machine parts is known as: 

1. friction
2. torsional
3. repulsive
4. magnetic

---

(iii)  As one goes far away from the earth, the density of air:

1. decreases
2. decreases
3.   remains constant
4. becames greater than its weight

---

(iv)  Ferry boat floats in sea water because its density is:

1. greater than that of water
2. smaller than that of water
3. the same as its weight
4. greater that its weight

---

(v)  Study Figure 1 below:

How far from the pivot must the 150g mass be placed for the system tr be in equilibrium?

1. 16.7cm
2. 17.6cm
3. 36.6cm
4. 26.7cm.

---

(vii) The suspended magnetic needle always comes to rest with its axis in a vertical plane called:

1. geographic meridian 
2. magnetic meridian
3. geographic declination
4. magnetic declination.

---

(viii)As the angle between two plane mirrors increases, the number of I images formed:

1. decreases
2. increases
3. remains constant
4. goes to infinity.

---

(ix)  Which of the following materials do not allow light to pass through?

1. Glass 
2. Tinted glass
3. Clear plastics
4.  Human bodies

---

(x) To view objects that are out of direct vision we can use a

1. telescope 
2. microscope
3. periscope 
4. slide projector.
   

---

(xi)  The process by which water soaks through the cells of rice and beans is called:

1. capillarity
2. cohesion
3. diffusion
4. osmosis

---

(xii)  Which of the following is a property of mercury •as a thermometric liquid?

1. Boils at 78⁰C 
2.  Boils at 360⁰C
3. Wets glass
4. Expands rapidly

---

(xiii)The area under velocity-time graph represents:

1. distance
2. speed
3. acceleration
4. deceleration

---

(xiv)  If the pitch of a micrometer screw gauge is 0.5mm, then its thimble has:

1. 10 equal divisions
2. 100 equal divisions
3. 50 equal divisions
4. 500 equal divisions

---

(xv)  Which of the following is a magnetic material?

1. Copper
2. Cobalt
3. Zinc
4. Brass

---

(xvi)  An electrostatic machine which produces unlimited supply of sparks by induction is called:

1. Gold leaf electroscope
2. Electrophorus
3. Generator
4. Speedometer

---

(xvii) The quantity of electric current caused by excess electrons is called:

1. coulomb
2. electric charge
3. electric charge
4. electrification

---

(xviii)Which of the following is not a sustainable source of energy?

1. Sun 
2.  Generator
3. Wind
4. Sea wave

---

(xix)A temperature Of 68⁰C is equivalent to;

1. A. 20 ⁰F 
2. 450F 
3.  154.40F
4.  90.40F

---

(xx) Action and reaction are equal in magnitude but opposite in direction. This statement refers to;

1. the law of inertia
   
2. newtons second law of motion
3. the principle of moment
4. newtons third law of motion

---

SECTION B (40 Marks)

2.  Match each item in List A with a correct response in List B by writing its letter below the number of the corresponding item in the table provided.

LIST A	LIST B
Measures how much the position has changed. Measures the net change in position. Rate of change of distance. Rate of change of displacement. The constant rate of change of displacement. Rate of change of velocity. Motion under the effects of gravity. Measures the rate at which position changes.	A.  Gravitational acceleration. B.  Average speed. C.  Acceleration. D.  Uniform acceleration. E.  Free-fall motion. F.  Distance. G.  Speed. H.  Speed in metres. I.  Velocity. J.  Uniform velocity. K.  Displacement.

---

 

3.  Complete each of the following statements by writing the correct answer in the space provided.

(i)  The product of mass and velocity of a body is called _____________.

(ii)  Claw hammers and pairs of scissors are in which class of levers? ______________

(iii) Weight has the same SI unit as _________________.

(iv) An instrument used to measure pressure of a gas is known as ________________.

(v) The tendency of a liquid to rise in narrow tubes is called __________________.

---

4. (a) Define the following terms as applied in measurements and give two examples:

 (i) Fundamental quantities ______________

 (ii) Derived quantities __________________

 (b) Figure 2 shows a graduated cylinder containing water before and after a stone is immersed.

Figure 2

 If the mass of the stone is 50 g, calculate the 

 (i) Volume of the stone.

 (ii) Density of the stone.

---

5.  (a) (i) List two characteristics of images formed by plane mirrors. 

 (ii) Giver a reason why the sky appears blue during a clear sunny day?

 (b)  Draw the diagram of each of the following:

(i)  Parallel rays of light.

(ii)  Divergent rays of light.

(iii)  Convergent rays of light.

---

6.  (a) Define the following terms as used in Physics and give their SI units:

(i)  Work

(ii)  Energy 

 (b) A man lifts a load of 20 kg through a height of 4 m in 10 seconds. Calculate the:

(i)  Work done.

(ii)  Power developed by the man

---

SECTION C (40 Marks)

7.  (a) (i) State the principle of moments 

 (ii) A uniform half metre rule is freely pivoted at the 20 cm mark and it balances horizontally when a body of mass 30 g is hung at 5 cm mark from one end. Calculate the mass of the rule.

(b)  (i) What is meant by equilibrium? 

(ii)  List three applications of equilibrium in daily life.

---

8.  (a) Define the following terms:

(i) Inertia 

(ii)  Impulse

(b)  (i) Give two practical examples where impulse and momentum play an important role.

(ii) A tennis ball of mass 120 g moving at a speed of 10 m/s was brought to rest by one player in 0.02 seconds. Calculate the average force applied by the player.

---

9.  (a) (i) What is the function of a rheostat in an electric circuit?

 (ii) List four factors that affect the resistance of a conductor.

(b)  Study the circuit diagram in Figure 3, then answer the questions that follow:

Figure 3: If the current flowing in 5 ? resistor is 2 A, calculate the 

(i) Current flowing in the 10 ? resistor.

(ii) Potential difference (p.d.) across the 20 ? resistor.

---

10. (a) (i) Define the term pressure and give its SI unit. 

 (ii) Why are dams constructed thicker at the bottom than at the top?

 (b) (i) List three applications of hydraulic presses. 

 (ii) A hydraulic brake has a force of 1000 N applied to a piston whose area is 50 cm². Calculate the pressure transmitted throughout the liquid.

---

THE UNITED REPUBLIC OF TANZANIA

MINISTRY OF EDUCATION AND VOCATIONAL TRAINING

FORM TWO SECONDARY EDUCATION EXAMINATION, 2013 0031 PHYSICS 

TIME: 2½ HOURS 

INSTRUCTIONS

1.  This paper consists of sections A, B and C.

2.  Answer ALL questions.

3.  ALL answers must be written in the spaces provided. 4. Write your examination number at the top right corner of every page.

5.  ALL writing must be in blue or black ink EXCEPT drawings which must be in pencil.

6.  Cellphones and calculators are not allowed in the examination room.

7.  You may use the following constants in your calculations:

Density of water = 1 g/cm³ or 1,000 kg/m³

Density of mercury = 13.6 g/cm³ or 13,600 kg/m³

Acceleration due to gravity = 10 m/s²

Standard Temperature and Pressure (STP): T = 273 K, P = 760 mm Hg.

SECTION A (20 MARKS)

1.Write the letter of the correct answer in the box provided for each of the following items:

i) The relation of Physics with Chemistry is in making:

1. algebra, trigonometry and chemical change
2. insect killers, perfume and fertilizers
3. photosynthesis and food
4. rain gauge, wind vane and thermometer.

---

(ii) Which of the following group of instruments is used to measure the basic fundamental quantities?

1. Beam bålance, stop watch and vernier calliper
2. Chemical balance, stop watch and measuring cylinder
3. Measuring cylinder, beam balance and metre rule
4. Spring balance, stop watch and micrometer screw gauge.

---

(iii) The swelling of soaked beans in water is demonstration of:

1. capillarity
2. diffusion
3. osmosis
4. viscosity

---

Which of the following is a property of a solid state?

1. Inter-particles distance is large
2. Particles are closely packed together
3. Particles are not closely packed together
4. Particles move randomly

---

(v) An instrument which is used to observe objects around obstacles is

1. microscope
   
2. periscope
3. plane glass
4. telescope

---

(vi) The relationship between pressure and area is that on:

1.   changing area, nothing happens
2. decreasing area, pressure decreases
3. decreasing pressure, volume increases
4. increasing area, pressure decreases

---

(vii)  A piece of metal with a volume of 0.00012m³ has a mass of 0.12kg. The density of metal will be:

1. 100kg/m³ 
2. 1,000kg/m³
3. 10,000kg/m³ 
4. 1000,000kg/m³

---

(viii)  If a student gets an electric shock and falls down unconscious in a physics laboratory, which of the following would you do first to help the victim?

1. Administer breathing exercise
2. Call a medical doctor immediately
3. Call other students to surround the victim
4. Call a physics teacher to give the victim medicine

---

(ix)  The sun is an example of a luminous body because it:

1. is a big star
2. is made by God
3.   produces its own light
4. reflects light from the earth

---

(x)  A smell of rotten body can be felt through the process of:

1. diffusion
2. evaporation
3. osmosis
4. transpiration

---

(xi)  The energy formed due to the rising and falling in the level of water in the oceans or seas is known as:

1. electric energy
2. tidal energy
3. water energy
4. wind energy

---

xii) the following are applications of magnetism in daily life except;

1. banks make use of magnetic ink on cheques
2. flour is passed near a magnet before being packed
3. magnets are used to separate sand from glass
4. VHS tapes are manufactured as a result of magnetism

---

(xiii)  A measuring cylinder contains liquid to a level x. An object of volume z is totally immersed in the liquid contained in the cylinder. The new reading of the level of the liquid will be:

1. x
2. x-z
3. z+x
4. z-x

---

(xiv)  An object with low centre of gravity and a wide base is:

1. neutral
2. stable
3. unequilibral
4. unstable

---

(xv) A ball of mass 0.6kg is kicked vertically up to a height of 6m. The potential energy acquired by the ball is:

1. A. 0.36J 
2.  3.6J
3. 36J
4. D. 3601

---

(xvi)  From the Archimedes principle, the upthrust acting on a body is equal to the:

1. apparent loss in weight
2. apparent weight
3. weight of a body in air
4. weight of a body in water

---

(xvii)  What is the total resistance of two resistors, RI = 2 and Rz 3 connected  in parallel?

1. 1.2
2. 5
3. 6
4. 12

---

(xviii)  The SI unit of electric charge is:

1. ampere
2. coulomb
3. ohm
4. second

---

(xix)  The acceleration of a body of mass 3Dkg when a constant force of 150N is applied on it will be:

1. 0.05m/s² 
2. 0.5m/s²
3. 5.0m/s2
4. 50m/s²

---

xx) Materials which allow electricityand heat to pass freely are termed;

1. conductors
2. insulators
3. semi-conductors
4. semi-insulators

---

SECTION B (40 MARKS) 

2.Match each item in List A with a correct response in List B by writing its letter below the number of the corresponding item in the table provided.

LIST A	LIST B
Attractive force between molecules of the same substance Bodies that give out light Device used to put on and off an electric current Instrument used to convert wind energy to mechanical energy Magnetic field is zero Measures body temperature Measures mass of the body Product of mass and velocity	Adhesive force Beam balance Clinical thermometer Cohesive force Luminous objects Magnetic field Momentum Neutral point Six’s thermometer Spring balance Switch Wind mill

---

3. Complete each of the following statements by writing the correct answer in the spaces provided.

1.  In the velocity time graph, the slope represents   
2.  The weight of a body when in water is known as   
3.  Devices for storing charge are called   
4.  The type of force which causes the size and volume of an object to decrease is known as  
5.  The tendency of an object to remain on the surface of a fluid due to the force  exerted by the fluid is called  

---

4. (a) Define the term “Pressure”  

 (b)  A rectangular object whose dimensions are 1.4 m by 0.1 m by 2.0 m has a density of 200 kg/m³. Calculate the minimum pressure when placed on a table.

---

5. (a) Define each of the following terms as applied in Physics:

(i)  Volume 

(ii)  Moment of force 

(b)  An object of 100 kg is lifted to a height of 5 m above the ground in 3 seconds. Calculate its:

(i)  Work done 

(ii) Power

 

---

6.  (a) Define the term “force” and state its SI unit

(b) A spring balance reads 12 N when a metal block is suspended from it and 10 N when the block is completely immersed in water. Calculate the: 

(i)  Upthrust on the block

(ii)  Relative density of the block

---

SECTION C (40 MARKS) 

7.  (a) Define the following terms as applied to machines:

(i)  Load 

(ii)  Effort 

(iii)  Efficiency 

(b)  A load of 500 N is raised through 5 m by a machine when its effort moves simultaneously though a distance of 25 m. If the efficiency of the machine is 80%, calculate its mechanical advantage.

---

8.  (a) (i) State the law of conservation of linear momentum. 

  (ii) Define the term “elastic collision”.

(b) A body of mass 8 kg moving with a velocity of 20 m/s collides with another body of mass 4 kg moving with a velocity of 10 m/s in the same direction. The velocity of the 8 kg body is reduced to 15 m/s after the collision. If the bodies do not stick together after the collision, calculate the final velocity of the 4 kg body.

---

9.  (a) Differentiate a ray of light from a beam of light.

 (b)  Mention four properties of an image formed by a plane mirror.

---

10.  (a) State the law of magnetism. 

(b) For each of the following, sketch the resulting magnetic field and mark the position of the neutral point if any, when:

(i)  Two N-poles are brought close to each other but not touching.

(ii)  N-pole and S-pole are brought close to each other but not touching.

---

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2012

SECTION A

(i) Physics can be defined as the study of:

1. behaviour of living things
2. composition and decomposition of matter
3. man and his environment
4. matter in relation to energy

---

(ii) The following instruments are used to measure length except:

1. hydrometer
2. metre rule
3. micrometer screw gauge
4. vernier caliper

---

(iii) A force exerted by a pressure of 20Pa acting over an area of 2m² is:

1. ION
2. 18N
3. 22N
4. 40N

---

(iv) A Bunsen burner has a massive and wide base in order to:

1. lower its centre of gravity
2. make it give out good flame
3. raise its centre of gravity
4. support it on the surface

---

(v) A body which gains electrons will attract a:

1. body which has gained neutrons
2. negatively charged body
3. neutral body
4. positively charged body

---

(vi) Pressure in a liquid contained in a vessel depends on:

1. density
2. depth
3. mass
4. surface area

---

(vii)The energy from hot rocks within the earth is called:

1. biomass
2. coal-burning
3. geothermal
4. tidal

---

(viii)Materials which allow only a small portion of light to pass through are called:

1. opaque
2. penumbra
3. translucent
4. transparent

---

(ix)Measurement of mass using an equal arm balance lever is an application of the principle of:

1. conservation of energy
2. conservation of linear momentum
3. conservation of mass
4. moments

---

(x)A current of 0.2A flows through a resistor of 200. The potential difference across the resistor is:

1. 0.04V
2. 4V
3. 40V
4. D. 400V

---

(i) Physics can be defined as the study of:

1. behaviour of living things
2. composition and decomposition of matter
3. man and his environment
4. matter in relation to energy

---

1. 0.04V
2. 4V
3. 40V
4. D. 400V

---

(xi)Strong and permanent magnets are made up of:

1. aluminium and nickel
2. cobalt and nickel
3. iron and magnesium
4. nickel and silver

---

(xii)A lever which has its fulcrum between effort and load is said to be of:

1. First class
2. Fourth class
3. Second class
4. Third class

---

(xiii)Which of the following is true about atmospheric pressure?

1. Decreases as one moves above the sea level
2. Increases as one moves above the sea level
3. Is greater than ones internal body pressure
4. Is higher on the moon than on the earth

---

(xiv)The product of force and displacement is known as:

1. energy
2. momentum
3. power
4. work done

---

(xv)A body moved a distance of 200cm in 2seconds. Its velocity in SI units was:

1. 1m/s
2. 100m/s
3. 400m/s
4. 4000m/s

---

(xvi)A passenger in a bus which starts to move forward tends to fall backwards. This phenomenon demonstrates:

1. Newtons first law of motion
2. Newtons second law of motion
3. Newtons third law of motion
4. The law of conservation of linear momentum

---

(xvii)The boiling point of pure water at sea level is:

1. 0 ^OF
2. 100^OF
3. 2000F
4. 212⁰F

---

(xviii)Forces that exist between molecules of the same substance are called:

1. adhesive
2. attractive
3. cohesive
4. repulsive

---

(xix)An image formed in a plane mirror is always:

1. larger than the object
2. smaller than the object
3. real
4. virtual

---

(xx)Motor vehicle tyres are made up of grooved rubber in order to:

1. decrease speed of the vehicle on the road for safety purposes
2. decrease stability of the tyres on the road
3. increase friction between tyres and the road for safety braking
4. increase speed of the vehicle on the road

---

SECTION B

2.Match each item in List A with a response in List B by writing its letter beside the number of the corresponding item in the table provided.

LIST A	LIST B
(i) Distance travelled per unit time (ii)  Earth is between the sun and the moon  (iii) Force is directly proportional to the extension (iv)  Friction between the layers of fluids  (v) Instrument for measuring electric cur­rent (vi) Measures gas pressure (vii) Momentum change (viii) Thermodynamic temperature	Ammeter  Capillarity  Fahrenheit  Hooke's law  Impulse  Kelvin Lunar Eclipse  Manometer  Moment  Speed Velocity  Viscosity

---

3.(a) Differentiate between:

(i) Scalar and vector physical quantities 

 (ii) Kinetic and potential energies.

(b) Give two differences between mass and weight of an object.

---

4.(a) Elasticity can be defined as .

(b) Mention two methods by which a magnetic substance can be turned into a magnet.

(c) Two types of intermolecular forces are:

---

5. (a) Three states of matter are:

(b) Lubricants are mostly applied in machine parts in order to

(c) Draw magnetic lines of force of a bar magnet showing its poles.

---

6.(a) Mention three states of equilibrium.

(b) Calculate the mechanical advantage of a simple machine which has a velocity ratio of 5 and efficiency of 80%.

---

7.(a) Define each of the following terms as applied in physics:

(i)Work

(ii)Energy

(iii)Power

(iv)Density

(b) A force of ION acts on a stationary object of 5kg. This action causes an object to move along a smooth horizontal surface for 8 seconds before  stopping. What is the velocity of the object?

---

8.(a) Explain briefly why:

(i)Water tanks have their outlets fixed at the bottom?

(ii)A tractor with wide tyres cannot easily get stuck in muddy places as compared to vehicles with narrow tyres.

(b)     Calculate the maximum pressure exerted by a block of mass 150kg and surface dimensions of 4m by 6m by 8m resting on the table.

---

9.  State the following:

(i) Archimedes principle

(ii) Law of flotation

(b) A body has a mass of 120g and a volume of 100cm³. Will the body sink or float in water? Give reason for your answer.

---

10.(a) State Ohms law.

 In the diagram below calculate the value of R.

A potential difference of I0V is applied across parallel resistors of 20 and 40. Calculate the current in the circuit.

---

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2011

Whenever necessary use thefollowing constants:

Density of water = lg/cm³ or 1000kg/m³

Acceleration due to gravity: g = 10m/s²

Density of mercury = 13.6g/cm³ or 136000kg/m³

SECTION A

1. Write the letter of the correct answer in the box provided.

 (i) The following are fundamental quantities in mechanics except:

1. .length
2. .mass
3. .time
4. .weight

---

(ii) Which of the following groups represent forces?

1.  Acceleration, energy and light 
2.  Energy, heat and upthrust
3.  Friction, gravity and upthrust 
4.  Gravity, light and velocity

---

(iii)Sustainable energy sources are:

1.  biogas, kinetic energy and petrol
2. biogas, tidal energy and water energy
3. firewood, petrol and tidal energy
4. kerosene, nuclear energy and water energy

---

(iv)The best test for a magnetized material is:

1.   attraction
2. friction
3. heating
4. .repulsion

---

(v)The type of light beam produced by the sun is:

1.  converging
2.  diverging
3.  parallel
4.  radial

---

 (vi) What makes the last drop of tap water remain hanging for sometime at the outlet of the tap soon after closing the tap?

1.  Capillarity 
2.  Osmosis
3.  Surface tension 
4.  Viscosity

---

 (vii)A vernier caliper reads 6.23cm. The reading in millimeters on the vernier scale is:

1.  0.03 
2.  0.3 
3. . 2.3 
4. . 6.2

---

(viii)A clinical thermometer differs from other thermometers because it:

1.  can be used to measure the temperature of ice 
2.  can be used to measure the temperature of melting iron 
3.  .has a constriction
4. .is very small

---

(ix)A potential difference of 12V is applied across a resister of 1200, The current in circuit is:

1.  0.1A 
2.  10A 
3.  132A 
4.  440A

---

(x)A plane mirror always forms:

1. inverted virtual image
2. magnified lateral image
3. real lateral image
4. virtual lateral image

---

(xi)The volume of a piece of metal with a mass of 150g and density of 0.03g/cm³ is:

1.  5 x 10-3 cm ³
2.  5 x 10 ¹ cm ³
3.  5 x 10 ² cm ³
4.  5 x 10 ³ cm³

---

(xii)A liquid at 100 ⁰ C is as hot as:

1.  200 ⁰F 
2.  212 ⁰ F 
3.  219 ⁰F 
4.  2600F

---

(xiii)Work and energy have the same SI unit called:

1.  calorie
2.  joule
3.  pascal 
4.  watt

---

(xiv)When charging bodies by friction, the particles which are transferred are:

1. electrons
2. neutrons
3. neutrons and protons
4. protons and electrons

---

(xv) First Aid is an immediate assistance or care given to a sick person or an accident victim before getting:

1. help from nearby people
2. professional medical help
3. relatives and friends assistance 
4. traditional medical care

---

(xvi)The area under the velocity-time graph represents:

1. acceleration 
2. distance covered 
3. speed 
4. velocity

---

(xvii)A machine has a velocity ratio of 15. If an effort of ION is applied to lift a load of 50N, its efficiency is approximately equal to:

1. 20%
2. 33%
3. 50%
4. 75%

---

(xviii)When reading the volume of water in a burette, one needs to look at the:

1. highest point of the meniscus
2. lowest point of the meniscus
3. mid point of the highest meniscus 
4. mid point of the lowest meniscus

---

(xix)The property of a material to recover its original shape and size on removal of a stretching force is called:

1.  compression 
2.  elasticity
3.  elastic limit 
4.  plasticity

---

(xx)When buying sugar from a shop you pay for its:

1. density 
2.  mass
3.  volume 
4.  weight

---

SECTION B

2. Match each item in List A with a response in List B by writing its letter below the number of the corresponding item in the table provided.

LIST A	LIST B
Angle between geographic axis and the magnetic axis. Anomalous expansion of water Converts sound to electrical energy Earth between sun and moon Material between the plates of a. capacitor Measures liquid pressure Measures the density of liquids Submarines, canoes, ships and M. balloons	Angle of declination Angle of elevation Between 00C and 40C Capacitors Dielectric Eclipse of the sun Floating objects Gas pressure Hydrometer Hygrometer Lunar eclipse Manometer Microphone Transformer

---

3. Complete each of the following statements by writing the correct answer in the spaces provided:

(a)In magnetism, points where the net magnetic field is zero are called

(b)The number of images (n) formed between mirrors placed at 9⁰, is given by the formula n = .....

(c)(i) Sea-wave energy is a result of .

(ii) Geothermal energy is 

---

4. (a) Define the term "electrostatics".

(b) Draw a diagram of the gold-leaf electroscope and label the following: brass cap, insulator, earthed metal case, gold leaf, brass plate and brass rod.

---

 5 (a) - Define the term "simple machine".

(b) Write down the velocity ratio of the following simple machines:

(i) Inclined plane

(ii) A pulley system

(c) Why musta liquid and nota gas be used as fluid in a hydraulic machine? Give two reasons.

---

6. (a) State Ohms law.

(b) A cell of8V is connected in series with a resistor of 30. What is the value of the current through the resistor?

---

SECTION C

7.(a) Define the term "centre of gravity".

(b) A uniform half-metre rule is freely pivoted at 15cm mark and it balances  horizontally when a body of mass of 40g is hung from a 2cm mark.

(i)Draw a clearly labelled diagram to illustrate the forces on a halfmetre rule.

(ii)Calculate the mass of the rule.

---

8.An object starts from rest and moves with a velocity of 20m/s for 5 seconds. It maintains this speed for 20 seconds before applying brakes, and comes to rest after 10 seconds.

(a)Sketch the velocity-time graph for this motion.

(b)From the graph drawn in part (a) above, find:

(i)Acceleration

(ii)Deceleration

Calculate the total distance covered for the whole motion.

---

9.(a) What is energy?

(b) State the principle of conservation of energy.

 (c) A motor exerts a horizontal force of 200N in pulling a box 10m across a level floor. How much work did the motor do?

---

10. (a) State Archimedes principle.

(b) A body weighs ION in air and 8N when completely immersed in a liquid of density 0.8g/cm³. Find:

(i)The volume of the liquid displaced

(ii)The density of the body

---