THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL OF TANZANIA FORM TWO NATIONAL ASSESSMENT
031 PHYSICS
Time: 2:30 Hours Friday, 15thNovember 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?
(ii) Which of the following is a safety precaution in the Physics laboratory?
(iii) Which instrument will you use to measure accurately the inside diameter of a bottle neck?
(iv) Which of the following statements is correct about mass?
(v) A hydrometer is an instrument used to measure
(vi) When a body of mass M, is lifted through a height h, it possesses the energy known as
(vii) If the angle between two plane mirrors is 60°, what will be the number of images?
(viii) The presence of charge in a material can be demonstrated by
(ix) A current of 0.2 A flows through a resistor of 4Ω. The potential difference across a resistor is
(x) The process of removing magnetism from a material is known as
(xi) How can a real image be distinguished from a virtual image?
(xii) Why an atom is electrically neutral?
(xiii) A potential difference of 12V is applied across a resistor of resistance 24 Ω. The current in a circuit is
(xiv) If a North pole is used in the stroking method of magnetization, the end where the stroking begins is
(xv) The Figure 1 shows a ruler balanced by placing the loads at its ends. What is the weight of X?
(xvi) Which of the following is an example of a third class lever?
(xvii) Distance between two moving objects will change if
(xviii) While of the following best illustrates Newton’s third law?
(xix) The temperature of a body of −40°C in Kelvin (K) scale is
(xx) Which of these resources of energy is non-renewable?
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 |
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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:
ii) A set of techniques used by scientists to investigate a problem refers to:
(iii)A vernier caliper is used to measure:
(iv)A force which prevents a body to slide is called:
(v)The ability of a body to float in a fluid is known as:
(vi)One of the following is the condition for a body to float in water:
(vii)In a solid state the force of attraction between molecules is greater because particles are:
(viii)The phenomenon observed when maize flour is poured on top of water is called:
(ix)Density and height are factors which affect pressure in:
(x)When a body is performing a work, it is said to have:
(xi)Which of the following unit could be used for kinetic energy?
(xii)Materials that allow only part of light to pass through them are called:
(xiii)What term refers to the stationary accumulation of charges on an object?
(xiv)The flow of electrons in a material is called:
(xv)Which of the following materials can be magnetized strongly?
(xvi)The point where the force of gravity can be considered to act is called:
(XVii) The rate of change of velocity of a body is known as:
(XViii)Why is the mechanical advantage less than three in a single rope three pulleys system?
(xix)The product of mass of a body and its acceleration is a result of:
(xx)A form of energy that can be persistently used without running out is
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 | |
(i) (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. |
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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:
(ii) Which of the following is a safety precaution in the Physics laboratory?
(iii)Which instrument will you use to measure accurately the inside diameter of a bottle neck?
(iv)Which of the following statements is correct about mass?
(v)A hydrometer is an instruments used to measure:
(vi)When a body of mass M is lifted through a height h, it possesses the energy known as:
(vii)If the angle between two plane mirrors is 60 0, then the number of images will be:
(viii)The presence of charge in a material can be demonstrated by:
(ix)What is the potential difference across a 4 resistor if a current of 0.2A flows through it?
(x)The process of removing magnetism from a material is known as:
(xi)How can a real image be distinguished from a virtual image?
(xii)Why is an atom electrically neutral?
(xiii)A potential difference of 12V is applied across a resistor of resistance 24 0. The current in a circuits is:
(xiv)If a North pole is used in the stroking method of magnetization, the end where the stroking begins is:
(xv)Figure 1 shows a ruler balanced by placing the loads at its ends. What is the weight X?
Figure 1
(xvi)Which of the following is an example of a third class lever?
(xvii)Distance between two moving objects will change if:
(xviii)Which of the following best illustrates Newtons third law?
(xix)The temperature of a body of -400C in Kelvin (K) scale is:
(xx) Which of these resources of energy is non-renewable?
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. |
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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:
(ii)Which of the following are used to stop fire?
(iii)If a micrometer screw gauge reads 5.0mm and 0.95mm for sleeve and thimble respectively, the length of object will be:
(iv)The force which exists between two close bar magnets with like poles is known as:
(v)Buouyant force is mainly determined by;
(vi) which one is an example of force?
(vii) Apparent loss in weight is known as;
(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;
(ix)A physical phenomenon observed when a tea bag is dropped into a cup of hot water is called:
(x)The walls of a dam are made thicker at the bottom than at the top because the:
(xi)How can you distinguish a lever from a pulley?
(xii)The term displacement means:
(xiii)Which of the following is the most closely related to inertia?
(xiv)Why is water unsuitable for a thermometer liquid?
(XV) The energy which is obtained from hot rocks underground is called.
(xvi)ln Figure 1 the angle of reflection is equal to:
Figure. 1
(xvii) Unlike magnetic poles as well as unlike electric charges, when brought close to each other they tend to
(xviii)The resistance of on operating lamp rated 115 V and 0.25 A is
(xix)In which region can the north pole of a magnet be directed?
(xx)Ability of man to walk properly along a road is one of the applications of
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. |
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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:
(ii) Which of the following is nota form of energy?
(iii)The speed of 72km/hr is equivalent to:
(iv)To minimize zero error the pointer of the instrument should be adjusted:
(v)The region around a magnet is called:
(vi)The tendency of an object to fall or drop lower levels in fluid is called.
(vii)The ability of a material to return to its original shape after deformation is called:
(viii)The energy associated with areas of frequent earthquakes is known as:
(ix)The image formed by plane mirror is always:
(x)An instrument used to store electric charges is called
(xi)A huge discharge of static electric charges between two clouds is called:
(xii)Electric current is expressed as
(xiii)The pressure exerted by a force 120N over an area of 10cm2 is:
(xiv)The change in momentum of an object when a force is applied to it is called:
(xv)Molecular forces that are exerted between molecules of the same kind are known as
(xvi)The point of support about which a bar or lever turns is referred to as a
(xvii)The rate at which work is done is called:
(xviii)The state of balance of a body is known as:
(xix)Water is unsuitable as a thermometric liquid because it .........
(xx)Which of the following is a property of gravitational 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, 28th November 2014 a.m.
(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:
(ii) The force which causes tear and wear between machine parts is known as:
(iii) As one goes far away from the earth, the density of air:
(iv) Ferry boat floats in sea water because its density is:
(v) Study Figure 1 below:
How far from the pivot must the 150g mass be placed for the system tr be in equilibrium?
(vii) The suspended magnetic needle always comes to rest with its axis in a vertical plane called:
(viii)As the angle between two plane mirrors increases, the number of I images formed:
(ix) Which of the following materials do not allow light to pass through?
(x) To view objects that are out of direct vision we can use a
(xi) The process by which water soaks through the cells of rice and beans is called:
(xii) Which of the following is a property of mercury •as a thermometric liquid?
(xiii)The area under velocity-time graph represents:
(xiv) If the pitch of a micrometer screw gauge is 0.5mm, then its thimble has:
(xv) Which of the following is a magnetic material?
(xvi) An electrostatic machine which produces unlimited supply of sparks by induction is called:
(xvii) The quantity of electric current caused by excess electrons is called:
(xviii)Which of the following is not a sustainable source of energy?
(xix)A temperature Of 680C is equivalent to;
(xx) Action and reaction are equal in magnitude but opposite in direction. This statement refers to;
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 |
| 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.
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
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
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.
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:
(ii) Which of the following group of instruments is used to measure the basic fundamental quantities?
(iii) The swelling of soaked beans in water is demonstration of:
Which of the following is a property of a solid state?
(v) An instrument which is used to observe objects around obstacles is
(vi) The relationship between pressure and area is that on:
(vii) A piece of metal with a volume of 0.00012m3 has a mass of 0.12kg. The density of metal will be:
(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?
(ix) The sun is an example of a luminous body because it:
(x) A smell of rotten body can be felt through the process of:
(xi) The energy formed due to the rising and falling in the level of water in the oceans or seas is known as:
xii) the following are applications of magnetism in daily life except;
(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:
(xiv) An object with low centre of gravity and a wide base is:
(xv) A ball of mass 0.6kg is kicked vertically up to a height of 6m. The potential energy acquired by the ball is:
(xvi) From the Archimedes principle, the upthrust acting on a body is equal to the:
(xvii) What is the total resistance of two resistors, RI = 2 and Rz 3 connected in parallel?
(xviii) The SI unit of electric charge is:
(xix) The acceleration of a body of mass 3Dkg when a constant force of 150N is applied on it will be:
xx) Materials which allow electricityand heat to pass freely are termed;
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 |
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3. Complete each of the following statements by writing the correct answer in the spaces provided.
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
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:
(ii) The following instruments are used to measure length except:
(iii) A force exerted by a pressure of 20Pa acting over an area of 2m2 is:
(iv) A Bunsen burner has a massive and wide base in order to:
(v) A body which gains electrons will attract a:
(vi) Pressure in a liquid contained in a vessel depends on:
(vii)The energy from hot rocks within the earth is called:
(viii)Materials which allow only a small portion of light to pass through are called:
(ix)Measurement of mass using an equal arm balance lever is an application of the principle of:
(x)A current of 0.2A flows through a resistor of 200. The potential difference across the resistor is:
(i) Physics can be defined as the study of:
(xi)Strong and permanent magnets are made up of:
(xii)A lever which has its fulcrum between effort and load is said to be of:
(xiii)Which of the following is true about atmospheric pressure?
(xiv)The product of force and displacement is known as:
(xv)A body moved a distance of 200cm in 2seconds. Its velocity in SI units was:
(xvi)A passenger in a bus which starts to move forward tends to fall backwards. This phenomenon demonstrates:
(xvii)The boiling point of pure water at sea level is:
(xviii)Forces that exist between molecules of the same substance are called:
(xix)An image formed in a plane mirror is always:
(xx)Motor vehicle tyres are made up of grooved rubber in order to:
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 |
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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
1. Write the letter of the correct answer in the box provided.
(i) The following are fundamental quantities in mechanics except:
(ii) Which of the following groups represent forces?
(iii)Sustainable energy sources are:
(iv)The best test for a magnetized material is:
(v)The type of light beam produced by the sun is:
(vi) What makes the last drop of tap water remain hanging for sometime at the outlet of the tap soon after closing the tap?
(vii)A vernier caliper reads 6.23cm. The reading in millimeters on the vernier scale is:
(viii)A clinical thermometer differs from other thermometers because it:
(ix)A potential difference of 12V is applied across a resister of 1200, The current in circuit is:
(x)A plane mirror always forms:
(xi)The volume of a piece of metal with a mass of 150g and density of 0.03g/cm3 is:
(xii)A liquid at 100 0 C is as hot as:
(xiii)Work and energy have the same SI unit called:
(xiv)When charging bodies by friction, the particles which are transferred are:
(xv) First Aid is an immediate assistance or care given to a sick person or an accident victim before getting:
(xvi)The area under the velocity-time graph represents:
(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:
(xviii)When reading the volume of water in a burette, one needs to look at the:
(xix)The property of a material to recover its original shape and size on removal of a stretching force is called:
(xx)When buying sugar from a shop you pay for its:
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 |
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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
THE UNITED REPUBLIC OF TANZANIA MINISTRY OF EDUCATION AND VOCATIONAL TRAINING
FORM TWO SECONDARY EDUCATION EXAMINATION, 2010
0031 PHYSICS
Time: 2 Hours
Instructions
1.This paper consists of sections A, B and C.
2.Answer ALL questions
3.Read carefully the instructions given in each section.
4.Write your examination number on every page.
5.Cellphones and calculators are not allowed in the examination room.
SECTION A
1.Answer all questions in this section by writing the letter of the correct answer beside the question number.
(i)Which of the following is a unit of length:
(ii)The reading accuracy of a steel ruler is:
(iii)Ohm is the SI unit of:
(iv)One of the following is not a pair of forces:
(v) A car starts from rest and accelerates uniformly at a rate of 6m/s2. What is its velocity 7 seconds later?
(vi)A boy weighing 45kg climbs up a stair case to height of 7 m in 5 seconds. The amount of work done by the boy:
(vii)A chemical engineer who wants to know the degree of hotness of the liquid to be used in the chemical process should measure its:
(viii)One of the following is a method of electrification:
(ix)A victim of electric shock is helped by:
(x)A current of 0.2A flows through a resistor of 20Ω. The p.d. across the resistor is:
(xi) As the balloon goes up, the weight of air displaced becomes less and less. This means that the upthrust:
(xii)The action of the gun and the bullet fired supports:
(xiii)When a bus is moving with constant velocity, its acceleration is:
(xiv)The process which helps the rise of kerosene in the wick of a lamp is called:
(xv)A body weights 3.0N in air. When it is completely immersed in a liquid it weighs 2.2N, the upthrust experienced by the body is:
(xvi) A stone is found to have 50 kg by mass at Moshi. When sent to Dar es Salaam its mass will be:
(xvii)Pressure in a liquid contained in a vessel depends on the:
(xviii)Charging an object by friction results in the transfer of particles called:
(xix)Juma wanted to measure the volume of a stone with an irregular shape. Which of the following pairs of instruments would you recommend that he use?
(xx)Penumbra refers to:
SECTION B
2.Match the items in List A with responses in List B by writing the letter of the correct response beside the item number.
LIST A | LIST B |
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3.Complete each of the following statements by writing the correct answer in the spaces provided:
a)Mass, length and ____are the three fundamental quantities of measurment in Physics.
b)Mention two applications of density in daily life:
c)The formation of a shadow is evidence that light travels in ____
4.The mass of an empty density bottle was 50g. When filled with a certain liquid of volume 20cm3 its mass became 75g. Find the:
a)Density of the liquid
b)Relative density of the liquid
5.a) Define the term “power”.
b) A man whose mass is 75 kg walked up 12 steps of 20 cm each in 5 seconds. Find the power that was developed.
6. a) State the two Laws of Reflection.
b)Draw a diagram showing a plane reflecting surface, reflected ray, incident ray, the normal, angle of incidence and angle of reflection.
c)What is the relationship between angle of incidence and angle of reflection?
SECTION C
7.a) A car accelerates uniformly from rest to a speed of 15 km/hr in 10 seconds. Find: (i) The acceleration in m/s2.
(ii) The distance covered during this period in metres.
b)The maximum retardation with which the breaks of a locomotive can reduce its speed is
1.8m/s2. Calculate the time in which the locomotive can be brought to rest.
8.Two cells each with an e.m.f. of 1.5 V and internal resistance of 2Ω are connected in (a) series (b) parallel. Find the current in each case when the cells are connected to 1Ω resistor. 9.a) What is atmospheric pressure? b)If the pressure is 650mm of mercury, express this value in SI units. 10.a) Sketch the electrical symbol for each of the following devices: (i)Ammeter (ii)Cell (iii)Switch (iv)Variable Resistor b) Sketch different diagrams and indicate the direction of the electric field formed by positive (+) and negative (-) charges in cases of: (i)Attraction (ii)Repulsion (iii) A soldier firing a bullet from a gun experiences a jerking effect as the bullet leaves the gun. This phenomenon is explained by: (iv) Materials which allow light to pass and you can see through are called: (v) In order to balance a rigid body on a point, you must first determine its: vi) If one cell in a perfect three-cell torch is placed in the opposite direction, then on switching on the torch will: (vii) The following instruments are used to measure length except: (viii) Presence of friction in a machine: (ix) You feel more pain if someone with pointed high heels shoes steps on your foot than when the same person with flat shoes steps on you because: (x) Gradient of the distance-time graph of a uniformly accelerated motion in a specific direction represents: (xi) Evaporation of a liquid does not depend on: (xii) According to Archimedes Principle, upthrust is equal to the: (xiii) Suppose you wanted to make strong permanent magnets, which of the following materials would you select? (xiv) White clothes are preferentially worn in sunny regions than black clothes because they: (w) Smell from a rotten dog along the road spreads to the neighbouring houses through a process known as: (xvi) Work and energy have the same SI unit called: (Wii) If you comb your dried hair with a plastic or nylon comb, you might observe the comb attracting some small particles. What instrument would you use to determine whether the comb acquired some electric charge? (xviii) The effort that would be needed to operate a 1200N load when the machine has a mechanical advantage of 3 is: (xix) The temperature of hot water was measured using a Fahrenheit thermometer and was found to be 1760F. What was its equivalent on the Celsius scale? (xx) Bimetallic strip bends when heated because metals: The study of matter in relation to energy is best covered in: ii) A student gets electric shock and falls down unconscious in a Physics laboratory. Which of the following would you do first to help the victim? iii) An engineer wanted to measure the diameter of a wire to the accuracy of three decimal places. Which of the following instruments would you recommend to be used? (iv) Sunflower cooking oil and water were mixed and poured into a Pyrex glass measuring cylinder and allowed to settle for three minutes. Which of the following observations was TRUE after the three minutes? v) Work and energy have the same SI unit called: vi) Weight is a force by which: (vii) A drop of water and a drop of mercury were poured separately on make after making observations on the water and mercury? (viii) An egg was immersed in a transparent liquid contained in a glass beaker. The egg was observed to float fully immersed in the middle of the liquid. What conclusion can you make from the observation? (ix) Pressure in a liquid contained in a vessel depends on: (x) In a three pulley system, the Velocity Ration (V.R) is given as: Physics is the study of relationship between: (iii) (iv) The SI unit of density is: (v) The force that causes twisting of an elastic material is called: vi) When a body floats on liquid, its: (vii) The molecules of water and those of glass will attract each other by a force known as: (viii) Manometer is used for measuring: (ix) A force exerted by a pressure of P/Nm2 and acting over an area of Am2 is: (x) The temperature of a body is defined as the degree of: (xi) Which of the following is the best reason for using alcohol in a minimum thermometer? (xii) Work and energy have the same SI unit called: (xiii) The image which is formed on a plane mirror is: (xiv) A level which has its effort between the load and fulcrum is said to be the: (w) When work output is equal to work input, it is called: (xvi) A bus carrying a heavy load on its topmost carriercan easily overturn when negotiating a corner because its: (xvii) The heat energy used to break bonds between molecules during melting process and to build bonds during freezing process is called: (xviii) A person standing in a bus which starts to move forward suddenly tends to fall backwards. This tendency obeys: (xix) The resistance of a lamp operating on a line of m volts and drawing a current of n amperes is: (xx) Magnetic materials can be magnetized in three different methods namely: (i)The branch of science in which the relationship between matter and energy is studied is called: (iii) When fire hazard from an electric fault erupts in a house: (iv) The process whereby materials recover the original length after removing the load or force is known as: (v) The Archimedes Principle states that: (vii) Pond skaters and mosquitoes are able to walk on the surface of water because of the: (viii) A suspended bar magnet comes to rest pointing approximately in the: (ix) A force exerted by a pressure of 20N/m2 acting over an area of 2m2 is: (x) What is the acceleration of a body of mass 30 kg when a constant force of 150N is applied on it? (xi) Increase in pressure raises the boiling point of a liquid. This principle is used in: (xii) If the system has a Velocity Ratio of 5, and the Efficiency of the system is 80%, what is the Mechanical Advantage of the pulley system? B. 400 c. 40 (xiii) The point at which all the weight of a body acts is called: (xiv) The movement of solvent-molecules from high to low concentration through a semi-permeable membrane is called: (xv) Potential energy and Kinetic energy are similar because: (xvi) The process of removing magnetism from a material is known as (Wii) A potential difference of 24 volts is applied across a resistor of resistance 12 ohms. The current flowing in the circuit is: (wiii) The heat energy from the sun reaches the earth by: (xix) Water of mass 3kg is heated from 260Cto 960C. What is the amount of heat supplied to the water? (xx) The image formed by a plane mirror is: (i) Physics is: (iii) umbra refers to; (iv) The pressure in liquid depends on: (v) When a narrow glass tube is dipped into mercury: (vi)Physics is applied in many fields such as: (vii) The quantity of energy possessed by a body which causes the (viii) The temperature of Dodoma town was 400C. This is equivalent to: (ix) An ammeter is an instrument for measuring: (xi) A piece of metal of volume 0.24cm3 and mass 0.72 has a relative density (R.D.) of: (xii) The presence ofpositive and negative charge in a body can be detected by using: (xiii) A body which sinks in water has its density: (xiv) A ball and ring experiment is used to verify the knowledge of: (w) A vernier scale reads 0.2mm when closed and 5.7mm when used to measure the diameter of a cylindrical body. What is the true diameter of the cylindrical body? (xvi) The mechanical advantage of a machine is 4. Find the effort needed to operate a machine of the load 1000N. (Wii) Food in a refrigerator is cooled by: (xviii) A black cloth is the material which is: (xix) The velocity ratio of a system of 3 pulleys is: (xx) A lever which has its load between the effort and fulcrum is said to be:A physicist is generally interested in studying the relationship between:
The measurement of mass using beam balance uses the principle of:
a clean glass surface. Which of the following conclusions would you
Laboratory rules are useful in:
Measurement in Physics is a process of:
The fundamental quantities of measurements are:
experiences a big loss in weight.
The SI unit of temperature is:
Surface tension of water
The SI unit of length is:
vibrations of its molecules is:
Relates temperature and pressure at constant volume: