PHYSICS FORM THREE NEW NECTA FORMAT

PRESIDENT’S OFFICE

REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED EXAMS

SECONDARY EXAMINATION SERIES

FORM THREE ANNUAL EXAMINATION

031                                                                                                  PHYSICS

 

TIME: 3HRS                                                               NOVEMBER, 2023

 

INSTRUCTIONS 

  1.                           This paper consists of section A, B, and C with a total of  eleven (11) questions
  2.                            Answer all questions in section A and B and any two (2) questions from section C
  3.                           Show clearly  your work
  4.                            Section A carries fifteen (15)marks, section B sixty (60) marks and section C carries twenty five (25) marks
  5.                            All writing should be in blue or black pen except for diagrams that must be drawn in pencil.
  6.                            Non-programmable calculator may be used
  7.                           Cellular phones and any unauthorized materials are not allowed in the examination room.
  8.                           Write your examination  number on each page of your answer sheet(s)
  9.                           Where necessary, use the following constants
  •                                 Acceleration due to gravity(g) = 10m/s2
  •                                Density of water = 1g/cm3 or 1000kg/m3

 

 

SECTION A (16 MARKS)

Answer all questions in this section

 

  1.        For each of items (i) – (ix), choose the most correct answer from among given alternatives and write its letter beside item number in answer sheet provided
  1. A bus carrying heavy load on its top carries is likely to overturn because.


  1. It runs faster
  2. Its center of gravity is low
  3. Its center of gravity is high
  4. Its equilibrium is neutral
  5. It is at stable equilibrium


  1. Which of the following conditions must be satisfied for a body to float?
  1. Apparent weight is equal to weight of the fluid displaced
  2. Real weight of the body equals to its upthrust
  3. Upthrust equal to weight of fluid displaced
  4. Apparent weight is equal to product of real weight of the body and its upthrust
  5. Density of a body is equal to density of surrounding fluid
  1. In an experiment, A simple pendulum showings between A and B. The amplitude of Oscillation is


  1. Distance A to B
  2. Half the distance A to B
  3. Distance A to B and Back
  4. Twice the distance A to B
  5. The distance from A in one direction


  1. From four students were discussing on properties of matter, where one of them said that solid has define shape and all member of group agreed. Which one could be the reason behind for solid to have definite shape?


  1. It has high adhesive force
  2. It has high surface tension
  3. It has low viscosity
  4. It has high cohesive force
  5. It has low adhesive force


  1. Angle was in a car, she tried to look at her friend who were outside of car through glass window, but she did not see well. You as a form as a form four student, what conclusion could you make on that glass window?


  1. It is transparent material
  2. It is translucent
  3. It is opaque
  4. It is not cleaned
  5. It is black


  1. Mndeme was cooking ugali in a good conductor container, but she seems to use iron handle which is covered by plastic at its holding handle to hold cooking container. Why did she use plastic handle and not iron?


  1. Its good conductor of heat
  2. It reflects heat
  3. Its particles are dose to each other
  4. It is poor conductor of heat
  5. It is a good heat emitter


  1. Which of the following do not affect the rate of evaporation of water in a dam?


  1. Surface area
  2. Depth
  3. Humidity
  4.        Barometric pressure
  5. Temperature


  1. Racing cars rarely get accidents despite their high speed because
  1. Have greater momentum
  2. Have big tyres with treads
  3. Have wide base and low center of gravity
  4. Exert greater frictional force
  5. Have less mass
  1. Retina in human eye has same function as which part of the lens camera.


  1. Shutter
  2. Diagram
  3. Film
  4. Convex lens
  5. Adjusting knob


  1. Which of the following factors influence friction between the surface of the road and tyres of a car moving with a constant speed?
  1. Weight and speed
  2. Nature of the surface and weight
  3. Surface area of the tyres and speed
  4. Acceleration and Nature of surface
  5. Speed and Nature of the surface

 

  1.        Match the following concept in List A with relevant description in List B by writing its letter beside the items number in sheet provided

LIST A

LIST B

  1. Self-induction
  2. Lenz’s law
  3. Mutual induction
  4. Step down transformer
  5. Faradays law of Electromagnetic induction
  6. Maxwell’s con screw rule.
  1. Determines direction of magnetic field produced by current carrying conductor
  2. Relate the magnitude of induced emf and rate of change of magnetic flux linking a conductor.
  3. Describes the direction of induced emf around the closed loop
  4. Variation, of magnitude of current flowing in a conductor itself
  5. Variation of magnitude of current in one coil induced current in the other
  6. Secondary voltage is smaller than primary voltage
  7. Primary voltage is higher than secondary voltage
  8. Interaction between electric and magnetic field.

 

SECTION B (54 Marks)

  1.        (a) Students from Mwenge University were climbing Mt. Kilimanjaro, Suddenly one of them started experiencing nose bleeding
  1. Comment on why the student experienced nose bleeding
  2. Why do astronauts wear space suits

(b) The acceleration due to gravity on Jupiter in about 2.6 times that of earth. A spacecraft has weight of 24500N on earth 

  1. What is the mass of space craft
  2. What would be its weight in Jupiter
  1.        (a)(i) What do you understand by the term specific heat capacity and specific latent heat of vaporization

(ii) Explain the factors that affect boiling point of water.

(b) What is the index of refraction for a certain medium if the light in air enters the medium at an angle of 30° and refracted at 22°C?

  1.        (a)Describe how a lens camera operates the same way as human eye. Give three points

(b) Briefly explain how conduction of heat can be applied in your daily life (Three reasons)

  1.        (a)Briefly explain why the doors of oven are made loosely fitting

(b) A steel bridge over a motor way is 20m at 0°C. How much longer is it at 20°C?

  1.        (a)Explain why a bat can fly in the dark without hilting objects

(b) A soldier standing in front of a vertical cliff fires a gun, he hears the echo after 3sec. On moving closer to the diff by 82.5m, he fires again, and hears the echo after 2.5 sec. Find 

  1. The distance of the diff from initial position of the mars
  2. The speed of sound
  1.        (a)You read a newspaper because of the light that it reflects. Why do you not see even a faint image of yourself in a newspaper?

(b) Name factors on which the angle of deviation produced by a prism depend

 

SECTION C (30 Marks)

Answer any two questions

  1.        (a)A wire is Answer is carrying current is it charged?

 

(b)Explain the following 

  1. A Kettle of water with steady supply of heats taken much longer time to boil dry it does to reach its boiling point.
  2. How does molecular theory of matter account for drop in temperature which results when for evaporation of volatile liquid occurs

 

(c)Why is a dull Black surface a better absorber of heat than a brightly polished surface?

  1.   (a) In which way does a wire carrying electric and placed between the poles of two magnets as shown in figure below tend to move? Explain your answer

 

(b)Explain any four (4) causes of power looses in a transformer that can reduce the efficiency of the transformer

 

(c)A 240V mains transformer has 1000 turns in its primary coil and it is designed to supply electrical energy to a 12V, 24W lamp. Determine the efficiency of the transformer if the current drawn from the 240V mains is 0.125A

 

  1.   (a)(i)State Ohms Law

(ii) How does Ohm’s law explain the fact that the resistance of a conductor depends on area of Cross-section of the conductor.

 

(b) (i)Explain why the path of lighting is not straight but zigzag

(ii)Two negative charges were brought together as shown below, re-draw a well diagram to show the magnetic field lines on how these two charges interact, remember to indicate neutral point.

 

(c) Study the circuit below and answer questions that follow.

  1. Calculate the equivalent resistance
  2. What is the reading of Ammeter
  3. What is the reading of Voltmeter?

LEARNINGHUBTZ.CO.TZFORM THREE PHYSICS MODAL SERIES 36

PRESIDENT OFFICE REGIONAL ADMNISTRATION

AND LOCAL GOVERNMENT

SECONDARY EXAMINATION SERIES 

COMPETENCE BASED ASSEMENT

PHYSICS FORM THREE

TERMINAL EXAMS MAY – 2023 

TIME: 3:00HRS

Instructions

  1. This paper consists of section A, B and C
  2. Answer all questions in section A and B and only one question from section c
  3. Whenever necessary the following constants may be applied
  1. Acceleration due to gravity “g” = 10M/S2
  2. Specific latent heat of vaporization of water (LV)=2.3 x 106 J/Kg
  3. Specific latent heat of fusion of water (Lf)=3.35 x 105 J/kg
  4. Density of water = 1000kg/m3
  5. Specific heat capacity of water (Cw) = 4200J/Kg°C
  1. For each of the items (i) – (x) choose the correct answer from among the given alternative and write its letter beside the item number.
  1. Diffusion occurs more quickly in a gas than in liquid because;
  1. The liquid contains a layer on its surface
  2. The gas contains semi-permeable membrane
  3. The gas molecules is small in size compared to the liquid molecules
  4. The adhesion is large than cohesion in gas compared to that in liquid.
  5. The speed of molecules in gas is greater than in liquid
  1. In a loading a lorry a man lifts boxes each of weight 100N through a height of 1.5m, if he lifts 4boxes per minute, the average power the man is working is;


  1. 100
  2. 10
  3. 600
  4. 37.5
  5. 2250


  1. In a process of charging by induction in static electricity
  1. A conductor is rubbed with an insulator
  2. Charge is produced by friction
  3. Negative and positive charges are separated
  4. A positive charge induces a positive charge
  5. Electrons are sprayed into an object
  1. Which of these resources of energy is non-renewable?
  1. Wave energy
  2. Bio fuels
  3. Radiant energy
  4. Fossil fuel
  5. Geothermal energy
  1. The temperature of a certain liquid is measured to be 273k. What will be its temperature in degree centigrade?


  1. 2370C
  2. 100°C
  3. 57°C
  4. 0°C
  5. 37°C


  1. The difference between a scalar and vector quantity is that;
  1. Scalar has a magnitude only
  2. A vector has magnitude and direction while scalar has magnitude only
  3. A scalar has both magnitude and direction while vector has magnitude only
  4. A scalar has both magnitude and direction
  5. All of the above mentioned are the correct answers
  1. Mercury forms spherical drops when split on a glass surface, this is because.........
  1. It has high adhesive force
  2. It has high cohesive force
  3. It has high surface tension
  4. It has high relative density
  5. It has high viscosity
  1. Repulsion is the force that push object against each other. This results when
  1. Magnet of the same poles
  2. Magnet of opposite poles
  3. Dipole of magnetic
  4. Magnet domain
  1. The movement of liquid from low to high concentration through a semi permeable is called
  1. Diffusion
  2. Fusion
  3. Osmosis
  4. Osmotic pressure
  5. Brownian motion
  1. An instrument used to measure length to the accuracy of 0.1mm is..........
  1. Tape measure
  2. Micrometer screw gauge
  3. Meter rule
  4. Venire calipers
  5. Classroom ruler
  1. Match the items in List A with responses to List B by writing the letter of the correct response beside the item number in the answer sheet provided.

LIST A

LIST B

  1. The ability of a body to regain its shape and size after deformation
  2. Is the ability of the surface of a liquid to behave like fully stretched elastic skin
  3. Is the of attraction between the molecules of the same substance
  4. Upthrust
  5. 273K
  1. 0°C
  2. Cohesive force
  3. Capillarity
  4. Elasticity
  5. Surface tension
  6. Apparent weight lose
  7. Adhesive force

SECTION B

Answer all questions from this section

  1. (a)A body dipped in a liquid experiences an upthrust. Explain three factors on which the upthrust depends

(b)Two identical free running trolleys are on a smooth horizontal runway. One trolley is at and the other approaches it at constant speed of 20m/s

  1. Use the principle of conservation of momentum find the common speed of two trolleys after the collision
  2. Why the kinetic energies before and after the collision are different?
  1. (a)A uniform half metre rule is balanced at 15cm mark when a load of 0.4N is hanging at the zero mark. Draw a sketched diagram indicating the arrow of weight of the rule acting through the centre of gravity hence determine the weight of the half metre rule.

(b)A screw jack a screw pitch of 5mm and the effort arm of 16cm

  1. State two forms of energy in which the energy supplied to the screw jack is finally converted to
  2. Determine the percentage efficiency of this screw jack, if it needs an effort of 30N to lift a load of 750N
  3. Why mechanical advantage is unitless?
  1. Define pressure
  2. Why at the bottom of the dam the wall constructed thicker?
  3. Why water flows more easily than other liquids like honey
  4. A person at high altitude suffer nose bleeding, explain why
  5. From the concept of pressure we explaining that pressure may be affected by several factors, mention at least three factors affecting liquid pressure.
  1. (a)(i)State ways to improve the efficiency of machines

(ii)The figure below shows the system of pulley used to raise a load by applying effort of 500N

State the velocity ratio and purpose of pulley 2.

(b)Given that the machine has an efficiency of 80%. Calculate the maximum load that can raised.

  1. The specific heat capacity of a certain substance is 800J/Kg°C. What does this statement mean?
  2. Why do we feel colder when wet?
  3. An insulated cup holds 0.3kg of water at 0°C. 0.2kg of boiling water at standard pressure is poured in the cup. What will be the final temperature?
  1. (a)Give reasons for the following;
  1. A gap is left between two successive rails
  2. A glass tumbler breaks when hot liquid is poured into it.

(b)Mention three applications of thermal expansion of a solid.

SECTION C

Answer two (2) questions from this section

  1. (a)(i)Why in case of liquids we distinguish between the coefficients of apparent and real expansion whereas in case of gases not, Explain.

(ii)The absolute expansivity of mercury is 0.0018°C – 1. Find the apparent volume expansivity of mercury in glass given that linear expansivity of glass is 0.00009°C-1.

(b)(i)Define linear expansivity of a substance.

(ii)A copper rod has a length of 40cm on a day when the temperature is 22.3°C. What will its length be on a day when the temperature is 30°C. (liners expansivity of copper is 0.000017°C).

  1.                      (a)Define the following terms;
  1. Heat capacity
  2. Specific heat capacity
  3. Shortly explain the methods of heat transfer

(b)(i)Give three points that the amount of heat supplied or taken away from a substance depends on;

(ii)A 100g piece of metal at 100°C is placed into 120g of water at 16°C in the vessel of negligible heat capacity. If the final temperature is 28°C. Calculate the specific heat capacity of the metal. (Specific heat capacity of water is 4200J/Kg°)

  1.                      (a)The diagram below show a bimetallic thermostat used to regulate a cooler and heater in a class room. It consist a brass of linear expansivity 18.9 x 10-4K-1 and iron of linear expansivity 10.2 x 10-4K-1. To keep the temperature in the room constant, which of the two devices A or B should be the heater? Explain your answer.

(b)Three beakers are of identical size and shape; one beaker is painted matt black, one is dull white and one is gloss white. The beakers are filled with boiling water

  1. In which beaker will the water cool most quickly? Give a reason
  2. State a process in addition to conduction, convection and radiation, by which heat energy will be lost from the beaker.

LEARNINGHUBTZ.CO.TZFORM THREE PHYSICS MODAL SERIES 33

PRESIDENT OFFICE REGIONAL ADMNISTRATION

AND LOCAL GOVERNMENT

SECONDARY EXAMINATION SERIES 

COMPETENCE BASED ASSEMENT

PHYSICS FORM THREE 

MID-TERM EXAMS MARCH – 2023 

031/1

Time: 3 Hours 

Instructions

  1.               This paper consists of section A, B and C with a total of eleven (11) questions.
  2.               Answer all questions in sections A and B and two (2) questions from section C.
  3.               Section A carries fifteen (15) marks, section B sixty (60) marks and section C carries twenty five (25) marks
  4.               Cellular phones and any unauthorized materials are not allowed in the examination room.
  5.               Non-Programmable calculators may be used
  6.               Write your examination number on every page of your answer booklet(s)
  7.               Where necessary the following constants may be used:
  1. Acceleration due to gravity, g=10m/s2
  2. Density of water = 1.0g/cm3
  3. Pie, π = 3.14
  4. Speed of light waves = 3.0 x 108m/s

SECTION A

  1.               For each items in (i) – (x) choose the correct answer from among the given alternative and write its letter in box provided
  1. In a process of charging by induction in static electricity
  1.              A conductor is rubbed with an insulator
  2.               A charge in procedure by friction
  3.              Negative and positive charges are separated
  4.             A positive charge includes a positive charge
  5.               Elections are sprayed into an object.
  1. The acceleration of a moving body may be found from
  1.              The area under its velocity-time graph
  2.               The slope of the velocity-time graph
  3.              The distance under its distance-time graph
  4.             The slope of the distance-time graph
  5.               The slope of peak of its distance time-graph
  1. Which of these energy is non-renewable?
  1.              Ware energy
  2.               Bio fuels
  3.              Radiant energy
  4.             Fossil fuel
  5.               Geothermal energy
  1. _____ is the area around a magnet current carrying conductor where magnetic strength can be detected by compass
  1.              Magnetic domain
  2.               Magnetic field
  3.              Magnetic poles
  4.             Induced filch
  5.               Neutral point
  1. Which of the following apparatus is used to measure volume of irregular solid?
  1.              Pipette
  2.               Beaker
  3.              Measuring tape
  4.             Measuring cylinder
  5.               burette
  1. A car moving with a velocity of 40km/h can be stopped by applying braces in2m. If the same car is moving with speed of 80km/h, what is the minimum stopping distance?
  1.              16m
  2.               12m
  3.              8m
  4.             4m
  5.               2m
  1. What are two factors that determine Buoyancy?
  1.              Volume of fluid displaced and mass of the object
  2.               Weight and mass of object
  3.              Density of fluid and weight of object
  4.             Volume of fluid displaced and density of fluid
  5.               Mass of object and density of object.
  1. Which physical phenomenon is observed when tea bag is dipped into a cup of hot water?
  1.              Steaming
  2.               Diffusion
  3.              Osmosis
  4.             Evaporation
  5.               Boiling
  1. Which process is involved in producing reverberation?
  1.              Refraction
  2.               Multiple reflection
  3.              Interference
  4.             Diffraction
  5.               Reflection
  1. Which of the following is a scalar quantity
  1.              Electric current
  2.               Force
  3.              Veracity
  4.             Displacement
  5.               Acceleration

 

 

 

 

 

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

 

LIST A

LIST B

  1. State of balance of a body
  2. Sum of forces on opposite direction
  3. The point where force of gravity can be considered to act
  4. Object with high center of gravity
  5. Turning effect
  1.              Center of gravity
  2.               Unstable equilibrium
  3.              Center of gravity
  4.             Unstable equilibrium
  5.               Point of application
  6.               Equilibrium
  7.              Stable equilibrium

 

SECTION B (70 Marks)

Answer all questions in this section

  1.               (a)Vectors are direction. What do you think are two conditions to be satisfied for two vectors to be equal?

(b) State and explain practical meaning of Triangle law of vector addition

(c) Two vectors, one of 8N and another 16N are acting on a body. Give that the two forces are acting perpendicularly to each other. Find the magnitude of the third force which would just counter balance the two forces.

  1.               How is the principal focus of a convex mirror explained as far as light is concerned,

A concave mirror is used to form an image of an object pin where the object must be placed to obtain:

(i) An upright, enlarged image

(ii) An image the same size as the object. 

(b) A diagram below shows the path of a ray of light through one corner of a cube ice. Find:

(i) The angle of incidence as the AB

(ii) The angle of refraction at this face. 

  1.               (a)A uniform half meter rule in balanced at 15cm marks when a load of 0.4N is hanging at the zero marks. Draw a sketched diagram indicating the arrow of weight of the rule acting through the centre of gravity hence determine the weight of the half metre rule.

(b)Screw Jack has a screw pitch of 5mm and effort arm of 16cm

  1. State two forms of energy in which the energy supplied to screw jack is finally converted to
  2. Determine the percentage efficiency of Screw jack if it need an effort of 30N to left a load of 750N
  1.               (a)State one use of convex mirror and indicate why it is preferred to a plane mirror

(b)An object in set 20cm in front of a lens and the real, inverted, magnifies and at greater distance image was formed. State the type of lens used and determine the value of focal length.

  1.               (a)You are provided with density bottle, water, Oil and beam/digital balance. Explain briefly the procedure you can use to determine the relative density of oil and deduce its formula

(b)A relative density bottle has mass of 14.6g when dry and empty. Its mass is 58.1g when full of Turpentine and 64.4g when full of water. Find relative density of Turpentine 

  1.               (a)(i)When a pulling force is applied to the handle of the door, the hinge acts as the axis of rotation, and the door turns about. What do you understand by term turning effect?

(ii) When forces are in equilibrium, it mean that there is no ret force to cause any movement. Describe conditions for parallel forces in equilibrium 

(b)A heary uniform metal beam AB weighing 500kg is supported at its end. The beam carries weight of 3000kg at a distance of 1.5M from end A. if the beam is 4m long determine the thrusts on the supports A and B

  1.               Explain with one reason as why Tanzania ports in Dar es Salaam and Zanzibar block and tackle pulleys are commonly used. 

(b) Exactly explain to why the efficiency of a pulley system is always less than 100%. Give only two reasons. 

(c) A wheel and axle with an efficiency of 90% is to be used to raise load of 10,000N. The radius of the wheel is 40cm while that of axle is 5cm, calculate:

(i) The velocity ratio of the wheel and axle 

(ii) The mechanical advantage of the wheel and axle 

 (iii) The effort required to raise the 10,000N load 

  

SECTION C. 15 MARKS ANSWER ONE QUESTION FROM THIS SECTION

 

10. (a) A body dipped in a liquid experience an upthrust. Explain three factors on which the upthrust depends. 

(b) Two identical free running trolleys are on a smooth horizontal runway. One trolley is at rest and the other approaches it at constant speed of 20m/s.

(i) Use the principle of conservation of momentum find the common speed of two trolleys after the collision. 

(ii) Why the kinetic energies before and after the collision are different?

11. (a) When a simple pendulum displaced at a small angle swing to and from, in this motion potential energy and kinetic energy changes by alternating each other. With the aid of diagram verify the alternation of these energies. 

(b) A 50kg girl runs up a staircase of 50 steps each step is 15cm in height in 5s. Find Work done against gravity by the girl and Power she use to run 

 

 

LEARNINGHUBTZ.CO.TZFORM THREE PHYSICS MODAL SERIES 32

THE PRESIDENT'S OFFICE

MINISTRY OF REGIONAL GOVERNMENT AND LOCAL GOVERNMENT

AUGUST-SEPTEMBER   EXAMINATION SERIES

PHYSICS  FORM-3

2020

TIME: 2:30 HRS

Instructions

  1. This paper consists of sections A, B and C with a total of eleven (11)          questions.
  2.  Answer all questions in sections A and B and two (2) questions     from section C.
  3.  Cellular phones and any unauthorised materials are not allowed in          the examination room.
  4.  Non-programmable calculators may be used.
  5.  Write your Examination Number on every page of your answer     booklet(s).
  6. Where necessary the following constants may be used:
  7.  Acceleration due to gravity, g = 10 m/s 2
  8. Density of water = I .0 g/cm 3 
  9. Pie= 3.14.
  10.  Coefficient of linear expansivity of the brick 1.2 x 10 -5 K -1
  11.  Speed of light in air = 3 x 108 m/s. 
  12. Speed of sound in air = 340 m/s.

SECTION A (15 Marks)

Answer all questions in this section.

1. For each of the items (i) - (x), choose the correct answer from among the given alternatives and write its letter beside the item number in the answer booklet provided.

(i) Which pairs of instruments would you use to correctly measure the diameter of a small ball bearing?

  1.  Measuring tape and vernier caliper
  2.  Slide rule and micrometer screw gauge
  3.  Vernier caliper and slide rule
  4.  Micrometer screw gauge and vernier caliper
  5. Metre rule and micrometer screw gauge

(ii) When the sun shines on the dark-coloured driving wheel of a car, the wheel feels warm. Why?

  1.  It is because the sun warms the car by induction.
  2.  It is because the sun gives energy to the wheel by convection.
  3.  It is because the sun radiates thermal energy to the wheel.
  4.  It is because the sun radiates heat to the glass windows.
  5. It is because the sun conducts thermal •energy to the wheel.

(iii)Which one is a characteristic of a plane mirror?

  1. It forms image which is real and opaque.
  2. It forms an image which is larger than the object.
  3. It forms an image which is real and laterally inverted
  4. It forms an image which has the same size as the object.
  5. It forms an image which is smaller in size than the object.

(iv)What role does the iris play in the human eye?

  1. To hold the lens in position.
  2. To prevent internal reflection.
  3. To control the size of the pupil.
  4. To control the thickness of the lens.
  5. To protect the eye from light.

(v) The correct arrangement of metals in ascending order of their linear expansivities is?

  1. Iron, Copper, Invar, Brass and Nickel
  2. Nickel, Brass, Invar, Copper and Iron
  3. Brass, Copper, Nickel, Iron and Invar
  4. Invar, Iron, Nickel, Copper and Brass.
  5. Nickel, Brass, Iron, Invar and Copper.

(vi) 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
  5. Geographic North Pole.

 

(vii) Which of the following is the correct weight of a body of mass 48 g when placed on the moon surface?

  1.  0.48 N 
  2.  4.8 N
  3.  0.80 N
  4.  0.048 N
  5.  80.0 N. 

(viii) A car moving at steady speed has a frictional force on its surface whose size depends on its

  1.  speed and surface area
  2.  speed
  3.  surface area
  4.  weight 
  5.  wheels speed. 

(ix) The image formed by plane mirrors are always

  1. real, magnified and laterally inverted
  2. virtual, laterally inverted and same in size
  3. magnified, virtual and erect
  4. laterally inverted, same in size and real
  5. erect, real and magnified.

(x)Lenz’s law can be applied to predict the

  1. magnitude of back e.m.f. in a circuit
  2. magnitude of induced current in a circuit
  3. direction of applied e.m.f. across the circuit 
  4. direction of induced e.m.f. in a circuit 
  5. direction of the applied e.m.f. within a circuit.

2. Match the items in List A with responses in List B by writing the letter of the correct response beside the item number in the answer booklet provided.

LIST A

LIST B

  1. Ability of liquids to rise or fall in a narrow tube.
  2. Tendency of an object to fall or drop to lower level in a fluid.
  3. Capacity of an object to float in a fluid.
  4. Attraction force between molecules of the same substance.
  5. Movement of particles from high concentration to low concentration.
  6. Tendency of matter to be in a state of random 
  1. Osmosis
  2. Surface tension
  3. Matter
  4. Buoyancy
  5. Cohesive
  6. Diffusion
  7. Plasticity
  8. Brownian motion
  9. Capillarity
  10. Viscosity
  11. Adhesive
  12. Elasticity
  13. Sinking

SECTION B (60 Marks)

Answer all questions in this section.

3. (a) Why a bubble of air increases in volume as it rises from the bottom of a pond of water to the surface? Briefly explain.

(b) A half meter rule AB is freely pivoted at 18 cm from end A and balances horizontally when a body of mass 35 g is hung 48 cm from end B. Calculate the mass of the rule. 

4. (a) Briefly explain why hydrometer 

(i) is weighed with lead shots.

 (ii) has a narrow stem.

(b)    A piece of rubber of volume 100 cm3    and the density of 0.45 g/cm3 floats in water. Calculate:

(i) The volume of rubber that partially immersed in water.

(ii) The force required to immerse the rubber completely.

5. (a) Give two examples which illustrate the rectilinear propagation of light.

(b) (i) The refractive index of light passing from water to air is 3/4. Calculate the critical angle. (ii) Outline two differences between primary and secondary rainbows.

6. (a) (i) What is the essential of kinetic theory of matter?

(ii) Sketch a graph showing how force applied in a stretched string varies with its extension.

(b) (i) State Hooke’s law.

 

(ii) List two applications of gamma rays.

7. (a) (i) Define turning effect of force and give its SI unit.

(ii) How the moment of force can be increased considerably in practical life? Give two examples.

(b) (i) List two factors that affect stability of a body

(ii) Briefly explain why the handle of a door is near its outside edge?

 

8. (a) (i) Distinguish between light spectrum and dispersion of light.

(ii) Briefly describe how a light ray passes through an equilateral glass prism.

(b) Study Figure 1 which represents three primary colours combines together and answer the questions that follow.

image

  1. Identify the colours represented by the letters A, B, C and D.
  2. What general name is given to the colours obtained by mixing two primary colours?
  3. Name the colour produced as a result of mixing three primary colours.

SECTION C (25 Marks) 

Answer two ( 2) question from this section.

9. (a) (i) What is meant by the term thermal expansion?

      (ii) Mention two applications of thermal expansion of solids.

 

(b)    (i) List three areas where bimetallic strips are used.

  (ii) Why a bimetal strip made of brass and invar is curved outside with brass?

 

(c)    Describe how simple fire alarm system operates.

 

10. (a) (i) Distinguish between primary and secondary cells, giving one example of each.

(ii) Identify two defects of a simple cell.

(b) (i) Explain why lead – acid accumulators are used in car batteries rather than dry cells?

(ii) A cell of unknown e.m.f, E and internal resistance 2? is connected to a 5? resistance. If the terminal p.d, V is 1.0V. Calculate the e.m.f, E of a cell.

(c) (i) List two devices that are important when checking electrical faults in domestic appliances.

(ii) Briefly explain why a very high voltage is necessary when transmitting electrical energy from power station?

11. (a) (i) What is meant by impulse of a force?

(ii) Briefly explain why seat-belts are designed to stretch in a collision.

(b) i) Define momentum.

  1. The cork of a bottle of mass 4 g is ejected with a velocity of 10 m/s in 0.1 second. Find the force exerted on the bottle.

(c)A car of mass 2000 kg is travelling along a straight road at a constant velocity of 10 m/s developing 3.0 kilowatts. If the engine of the car is switched off:

  1. Calculate the energy lost by the car in coming to rest
  2. Briefly explain the energy changes in the process stated in (c) above.

 

 

 

 

 

 

 

 

LEARNINGHUBTZ.CO.TZFORM THREE PHYSICS MODAL SERIES 19

THE PRESIDENT'S OFFICE

MINISTRY OF REGIONAL GOVERNMENT AND LOCAL GOVERNMENT

AUGUST-SEPTEMBER   EXAMINATION SERIES

PHYSICS  FORM-3

2020

TIME: 2:30 HRS

Instructions

  1. This paper consists of sections A, B and C with a total of eleven (11)          questions.
  2.  Answer all questions in sections A and B and two (2) questions     from section C.
  3.  Cellular phones and any unauthorised materials are not allowed in          the examination room.
  4.  Non-programmable calculators may be used.
  5.  Write your Examination Number on every page of your answer     booklet(s).
  6. Where necessary the following constants may be used:
  7.  Acceleration due to gravity, g = 10 m/s 2
  8. Density of water = I .0 g/cm 3 
  9. Pie= 3.14.
  10.  Coefficient of linear expansivity of the brick 1.2 x 10 -5 K -1
  11.  Speed of light in air = 3 x 108 m/s. 
  12. Speed of sound in air = 340 m/s.

SECTION A (15 Marks)

Answer all questions in this section.

1. For each of the items (i) - (x), choose the correct answer from among the given alternatives and write its letter beside the item number in the answer booklet provided.

(i) Which pairs of instruments would you use to correctly measure the diameter of a small ball bearing?

  1.  Measuring tape and vernier caliper
  2.  Slide rule and micrometer screw gauge
  3.  Vernier caliper and slide rule
  4.  Micrometer screw gauge and vernier caliper
  5. Metre rule and micrometer screw gauge

(ii) When the sun shines on the dark-coloured driving wheel of a car, the wheel feels warm. Why?

  1.  It is because the sun warms the car by induction.
  2.  It is because the sun gives energy to the wheel by convection.
  3.  It is because the sun radiates thermal energy to the wheel.
  4.  It is because the sun radiates heat to the glass windows.
  5. It is because the sun conducts thermal •energy to the wheel.

(iii)Which one is a characteristic of a plane mirror?

  1. It forms image which is real and opaque.
  2. It forms an image which is larger than the object.
  3. It forms an image which is real and laterally inverted
  4. It forms an image which has the same size as the object.
  5. It forms an image which is smaller in size than the object.

(iv)What role does the iris play in the human eye?

  1. To hold the lens in position.
  2. To prevent internal reflection.
  3. To control the size of the pupil.
  4. To control the thickness of the lens.
  5. To protect the eye from light.

(v) The correct arrangement of metals in ascending order of their linear expansivities is?

  1. Iron, Copper, Invar, Brass and Nickel
  2. Nickel, Brass, Invar, Copper and Iron
  3. Brass, Copper, Nickel, Iron and Invar
  4. Invar, Iron, Nickel, Copper and Brass.
  5. Nickel, Brass, Iron, Invar and Copper.

(vi) 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
  5. Geographic North Pole.

 

(vii) Which of the following is the correct weight of a body of mass 48 g when placed on the moon surface?

  1.  0.48 N 
  2.  4.8 N
  3.  0.80 N
  4.  0.048 N
  5.  80.0 N. 

(viii) A car moving at steady speed has a frictional force on its surface whose size depends on its

  1.  speed and surface area
  2.  speed
  3.  surface area
  4.  weight 
  5.  wheels speed. 

(ix) The image formed by plane mirrors are always

  1. real, magnified and laterally inverted
  2. virtual, laterally inverted and same in size
  3. magnified, virtual and erect
  4. laterally inverted, same in size and real
  5. erect, real and magnified.

(x)Lenz’s law can be applied to predict the

  1. magnitude of back e.m.f. in a circuit
  2. magnitude of induced current in a circuit
  3. direction of applied e.m.f. across the circuit 
  4. direction of induced e.m.f. in a circuit 
  5. direction of the applied e.m.f. within a circuit.

2. Match the items in List A with responses in List B by writing the letter of the correct response beside the item number in the answer booklet provided.

LIST A

LIST B

  1. Ability of liquids to rise or fall in a narrow tube.
  2. Tendency of an object to fall or drop to lower level in a fluid.
  3. Capacity of an object to float in a fluid.
  4. Attraction force between molecules of the same substance.
  5. Movement of particles from high concentration to low concentration.
  6. Tendency of matter to be in a state of random 
  1. Osmosis
  2. Surface tension
  3. Matter
  4. Buoyancy
  5. Cohesive
  6. Diffusion
  7. Plasticity
  8. Brownian motion
  9. Capillarity
  10. Viscosity
  11. Adhesive
  12. Elasticity
  13. Sinking

SECTION B (60 Marks)

Answer all questions in this section.

3. (a) Why a bubble of air increases in volume as it rises from the bottom of a pond of water to the surface? Briefly explain.

(b) A half meter rule AB is freely pivoted at 18 cm from end A and balances horizontally when a body of mass 35 g is hung 48 cm from end B. Calculate the mass of the rule. 

4. (a) Briefly explain why hydrometer 

(i) is weighed with lead shots.

 (ii) has a narrow stem.

(b)    A piece of rubber of volume 100 cm3    and the density of 0.45 g/cm3 floats in water. Calculate:

(i) The volume of rubber that partially immersed in water.

(ii) The force required to immerse the rubber completely.

5. (a) Give two examples which illustrate the rectilinear propagation of light.

(b) (i) The refractive index of light passing from water to air is 3/4. Calculate the critical angle. (ii) Outline two differences between primary and secondary rainbows.

6. (a) (i) What is the essential of kinetic theory of matter?

(ii) Sketch a graph showing how force applied in a stretched string varies with its extension.

(b) (i) State Hooke’s law.

 

(ii) List two applications of gamma rays.

7. (a) (i) Define turning effect of force and give its SI unit.

(ii) How the moment of force can be increased considerably in practical life? Give two examples.

(b) (i) List two factors that affect stability of a body

(ii) Briefly explain why the handle of a door is near its outside edge?

 

8. (a) (i) Distinguish between light spectrum and dispersion of light.

(ii) Briefly describe how a light ray passes through an equilateral glass prism.

(b) Study Figure 1 which represents three primary colours combines together and answer the questions that follow.

image

  1. Identify the colours represented by the letters A, B, C and D.
  2. What general name is given to the colours obtained by mixing two primary colours?
  3. Name the colour produced as a result of mixing three primary colours.

SECTION C (25 Marks) 

Answer two ( 2) question from this section.

9. (a) (i) What is meant by the term thermal expansion?

      (ii) Mention two applications of thermal expansion of solids.

 

(b)    (i) List three areas where bimetallic strips are used.

  (ii) Why a bimetal strip made of brass and invar is curved outside with brass?

 

(c)    Describe how simple fire alarm system operates.

 

10. (a) (i) Distinguish between primary and secondary cells, giving one example of each.

(ii) Identify two defects of a simple cell.

(b) (i) Explain why lead – acid accumulators are used in car batteries rather than dry cells?

(ii) A cell of unknown e.m.f, E and internal resistance 2? is connected to a 5? resistance. If the terminal p.d, V is 1.0V. Calculate the e.m.f, E of a cell.

(c) (i) List two devices that are important when checking electrical faults in domestic appliances.

(ii) Briefly explain why a very high voltage is necessary when transmitting electrical energy from power station?

11. (a) (i) What is meant by impulse of a force?

(ii) Briefly explain why seat-belts are designed to stretch in a collision.

(b) i) Define momentum.

  1. The cork of a bottle of mass 4 g is ejected with a velocity of 10 m/s in 0.1 second. Find the force exerted on the bottle.

(c)A car of mass 2000 kg is travelling along a straight road at a constant velocity of 10 m/s developing 3.0 kilowatts. If the engine of the car is switched off:

  1. Calculate the energy lost by the car in coming to rest
  2. Briefly explain the energy changes in the process stated in (c) above.

 

 

 

 

 

 

 

 

LEARNINGHUBTZ.CO.TZFORM THREE PHYSICS MODAL SERIES 18

                                                   LEARNING HUB TANZANIA

PHYSICS EXAMINATION FORM THREE

ANNUAL   EXAMINATIONS.

 

NAME………………………………………..CLASS……………………………………………….TIME:2:30HRS

 

INSTRUCTIONS:

-          This paper consists of section A,B and C

-          Answer all questions in section A and B. and only one question in section C

-          All answers must be written in the answer sheets provided

-          Write your name on every page of your answer sheets

 

 

SECTION A

Answer all questions in this section

  1. Choose the most correct answer from among the given alternatives and write the letter against the item number

(i)                Each scientific instrument is limited in accuracy. What is the shortest length that can be accurately measured by a metre rule

  1. 0.01mm
  2. 0.1mm
  3. 0.1cm
  4. 0.01cm

 

(ii)              Mercury forms spherical drops when spilled on the flour because

  1. It has high cohesive force
  2. Its velocity is very high
  3. It has large density
  4. It has low surface tension

 

(iii)            Compared to cool air, warm air can hold

  1. Less water vapor
  2. The same amount of water vapour
  3. No water vapour
  4. More water vapour

 

(iv)            When a person perspires on a hot day

  1. Heat is conducted away from the body
  2. Latent heat keeps the body warm
  3. Evaporation occurs and helps to cool the body
  4. Condensation occurs and helps to cool the body

 

 

 

(v)              The dew point is define as the

  1. Amount of water on grass found in the morning
  2. Amount of water vapour required to saturated it
  3. Temperature at which water vapour present in air is just sufficient to saturated it
  4. Rate at which water vapour present in the atmosphere evaporates

 

(vi)            Which of the following statements is correct?

  1. Certain lubricants can reduce friction to zero
  2. Air friction can cause a body to became hot
  3. Friction acts in the same direction as motion
  4. Walking would be made easier if friction did not exist

 

(vii)          A piece of copper is heated from 293k to 333k. identify a false statement among the following

  1. Its length will increase slightly
  2. Its electrical conductivity will decrease slightly
  3. Its density will increase slightly
  4.  Its weight will remain unchanged

 

(viii)       When charging a body by friction, the particles which are transferred are

  1. Nuclei
  2. Protons and electrons
  3. Protons
  4. Electrons

 

(ix)            A convex mirror always forms

  1. Virtual images only
  2. Real images only
  3. Inverted real images only
  4. Magnified virtual image

 

(x)              Which phenomenon causes the dispersion of white light into a spectrum by prism?

  1. Diffraction
  2. Reflection
  3. Refraction
  4. Absorption

 

 

  1. Match the items in list A with the response in list B by writing the letter of the correct response beside the item number

List A.

(i)                Complementary colours

(ii)              Surface tension

(iii)            A couple

(iv)            Critical angle

(v)              The siphon

 

List B.

  1. Measures the density of liquids
  2. The property of water surface to support a needle
  3. Tendency of a liquid to be drawn into small openings
  4. A point in a magnetic field where the resultant magnetic flux is zero
  5. Magenta and green
  6. Red and green
  7. The ratio sine of angle of refraction to the sine of angle of incidence
  8. Liquids which are difficult to stir and do not flow easily
  9. Measures relative humidity
  10. Consists of two equal and opposite parallel forces and has a turning effect
  11. Angle of incidence for which the angle of reflection is 90°
  12. The pull that resist the flow of liquids
  13. Occurs when the incident angle is greater than critical angle
  14. The chain and ball flushing tank
  15. Apparent weight is zero
  16. Force that causes elastic material to twist
  17. Bending of light which makes objects appear at incorrect position
  18. Controls change in temperature
  19. Upthrust of a liquid is equal to the apparent weight of the floating body
  20. Angle of reflection for which the angle of incidence is 90°

 

SECTION B 60 marks

 

  1. For each items (i – x) fill in the blanks  

(i)                The process in which the emission of radiation by the atmosphere warms the earths surface is called ________

(ii)              __________ is a freezing process which demonstrate the effect of pressure on the melting point of ice

(iii)            __________ is an instrument which can be used in submarine to view distant objects which are out of direct vision

(iv)            According to Archimedes principle upthrust is equal to _________

(v)              _________ of water is the abnormal expansion of water as it cools from 4°C to O°C

(vi)            ___________is the amount of heat required to change a unit mass of a solid to liquid at constant temperature

(vii)          The ratio of the volume of a substance to the volume of an equal volume of water is called the ____________

(viii)       ___________ is the amount of water vapor present in the atmosphere

(ix)            The work done per unit charge in moving electric charge from one point to another is known as __________

(x)              The quantity of heat required to change a unit mass of a substance from liquid to vapour at constant temperature is the ________________(10marks)

 

 

  1.  (a) Mass and weight of an object were determined while on the earth and then when on the moon. Suggest a reason for variation shown by one of the two quantities

 

(b) An object was totally immersed in water

(i) Identify two different opposing forces acting on the object

(ii) Write an equation which shows how the forces can be used to find the relative density of the object                                                                                                                 (10marks)

 

  1. (a) Define the term “heat”

(b) Explain why water is not used as thermometric liquid

(c) Calculate the specific heat capacity of mercury, if 980J of hat is required to raise the temperature of 7g of mercury from O°C to 1000°C                                   (10marks)

 

  1. (a) (i) Define the term centre of gravity

     (ii) Explain why a bus which is heavily over loaded on its roof can easily overturn

 

(b) (i) State the principle of moments

     (ii) A uniform half meter rule is pivoted at its 30cm mark. A mass of 50g hung at the 45cm mark keeps the rule horizontal. Determine the mass of the half metre rule

                                                                                                                                          (10marks)

  1. (a) Define the term linear expansivity

(b) A steel metal plate is 0.01m long at 20°C. if the coefficient of linear expansion of steel is 0.00011/°C. Calculate the increase in length when heated to 25°C(10marks)

 

  1. (a) State (i) Boyle’s law  (ii) Charle’s law

(b) (i) What does the term STP mean?

(ii) The volume of a gas at a temperature of 25°C and a pressure of 730mm Hg is 250cm3. Calculate its volume at STP                                                                  (10marks)

 

  1. (a) Define (i) e.m.f of a cell  (ii) Resistivity of a conductor

(b) A piece of wire 1m long and a diameter of 0.2mm has a resistivity of 3.2 x 10-3 ohm metre. Calculate (i) The resistance of the wire (ii) current flowing through the wire if connected to a 3V battery.                                                                        (10 marks)

 

 

 

SECTION C. 25 marks

         Answer only one question

  1. (a) Define the following

(i)                Boiling

(ii)              Evaporation

 

(b) Write down any four differences between boiling and evaporation

(c) Calculate the quantity of heat required to melt 5kg of ice and raise the temperature of the water formed to 100°C

Specific heat capacity of water = 4200J/kg°C

Specific latent heat of ice = 320,000J/kg

 

  1. (a) Define the following term

(i)                machine

(ii)              mechanical advantage

(iii)            velocity ratio

 

(b) A load of 500N is raised through 5metre by a machine when its effort moves through a distance of 25metre. If the efficiency of the machine is 80%. Calculate

(i) Total work done by the machine

(ii) Effort applied

12. (a) Define energy and state its SI unit

(b) If the man weighting 800N, takes 60seconds to run upstairs, in so doing he ascends a vertical height of 3cm, find his power.

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

(d) Determine the potential energy possessed by a particle of 0.2kg resting on a table 1.6m above the ground.

 

LEARNINGHUBTZ.CO.TZ Page 1

 

LEARNINGHUBTZ.CO.TZFORM THREE PHYSICS MODAL SERIES 16

 

 

 

 

                                                    LEARNING HUB TANZANIA

PHYSICS EXAMINATION FORM THREE

ANNUAL    EXAMINATIONS.

 

NAME………………………………………..CLASS……………………………………………….TIME:2:30HRS

INSTRUCTIONS:

-          This paper consists of section A,B and C

-          Answer all questions in both sections

-          All answers must be written in the space provided.

 

SECTION A.(15Marks)

  1. Choose the most correct answer from among the given alternatives and write its letter against the item number in the table provided at the end of the question

(i)                The ability to do work

  1. Work done
  2. Energy
  3. Power
  4. Joule

 

(ii)              An immediate assistance given to a sick or injured person before we get a professional medical help in hospital

  1. Treatment
  2. First aid kit
  3. First aid
  4. Assistance

 

(iii)            A deviation from tone reading

  1. Distance
  2. Parallax
  3. Measurement
  4. Error

 

(iv)            The SI unit of mass is

  1. Kilogram
  2. Newton
  3. Gram
  4. Metre

 

(v)              The movement of solvent molecules from a region of low concentration to a region of high concentration through a semi-permeable membrane

  1. Capillarity
  2. Diffusion
  3. Osmosis
  4. Cohesion

(vi)            A force acting perpendicular per unit surface area

  1. Force
  2. Density
  3. Volume
  4. Pressure

 

(vii)          Matter is made up of small particles that are in a state of continuous random motion

  1. Kinetic theory of matter
  2. Kinetic energy
  3. Random motion
  4. Brown motion

 

(viii)       Pressure in liquid depends on

  1. Depth and density of the liquid
  2. Mass and volume
  3. Mass and density
  4. Mass and weight

 

(ix)            The tendency of a body to remain on the surface of a fluid

  1. Upthrust
  2. Sinking
  3. Floating
  4. Archimedes principle

 

(x)              The property of a material to recover its original shape and size on removal of the force which cause deformation

  1. Compression
  2. Plasticity
  3. Electric limit
  4. Electricity.

 

i

ii

iii

iv

v

vi

vii

viii

ix

x

 

 

 

 

 

 

 

 

 

 

 

SECTION B. (40Marks)

 

  1. Match the items in list A with a response in list B by writing its letter below the number of the correct item in the table provided

List A.

(i)                Hooke’s law

(ii)              Hydrometer

(iii)            Relative density

(iv)            A joule

(v)              The ability of an object to float

(vi)            Micrometer screw gauge

(vii)          Force

(viii)       First aid kit

 

List B.

  1. Buoyancy
  2. Measures the diameter of pieces of wire
  3. Sinking
  4. Density
  5. Within the electric limit the extension of a material is direct proportional to the force applied provided the electric limit is not exceeded
  6. Particles in a solid
  7. A small box where items needed for first aid are kept
  8. A pull or push
  9. Mass
  10. A work done when a force of 1N moves an object through a distance of 1m in the direction of force
  11. Flotation
  12. The number of times a substance is denser than a given reference material
  13. Volume
  14. Measures relative density of liquid

 

 

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

(a)  State the law of floatation __________________________________________________________________________________________________________________________________________

(b)  What is upthrust? __________________________________________________________________________________________________________________________________________

(c)  A body weights 2.5N in air and 1.2N when completely immersed in a certain liquid. The upthrust acting on this body is                                             (10marks)

 

  1. I. (a) Define the term first aid ________________________________________________________________________________________________________________________________________________

(b) Mention three items found in a first aid kit

(i) _____________________________________________________________

(ii)_____________________________________________________________

(iii) ____________________________________________________________

II. (a) State Archimedes Principle

(b) An object weights 10.5N in air and its weight 4.5N when it is in water. Calculate: (i) Upthrust action on the body (ii) Relative density of the body              (10marks)

 

  1. (a) What is matter? ________________________________________________________________________________________________________________________________________________

(b) Mention three states of matter

(i)  _____________________________________________________________

(ii)_____________________________________________________________

(iii) ____________________________________________________________                     (10marks)

 

  1. (a) What is work done?

(b) What is the SI unit of work done __________________________________________

(c) Calculate the work done when a mass of 15kg is moved through a distance of 5metres                                                                                                                           (10marks)

 

 

  1.  (a) Define the following terms

(i)                Mass

(ii)              Density

(b) A solid object has a mass of 3kg, if its volume is 4m3. Calculate the density of this object                                                                                                                                            (10marks)

 

  1. (a) What is a laboratory?

(b) Mention any four laboratory rules

(c ) Why are laboratory rules important                                                      (10marks)

 

  1. (a) State the kinetic theory of matter

 

(b) What is

(i) Surface tension?

(ii) Capillarity?                     (10marks)

SECTION B 25 Marks

  1. (a) (i) The energy possessed by a body due to its motion is called ___________________ while the energy possessed by a body due to its position is called ___________________

(ii) Mention any three forms of energy

(a)  _______________________________________________

(b)  _______________________________________________

(c)  _______________________________________________

 

(b) An object has a mass of 10kg. calculate its kinetic energy if its speed is 5m/s

 

      11.   (a) Draw a well labeled diagram of a micrometer screw gauge

 (b) Define density of a substance

 (c) Find the mass of 1000cm3 of wood with the density of 0.9g/cm3

 

12. (a) Define pressure and state its SI unit

(b) A certain barometric reading was obtained as 70cm Hg. What is this value in N/m2 if the density of mercury is 13.6g/cm3 and g = 9.8N/kg? 1g/cm3 = 1000kg/m3

             (c) Why water is not used as barometric liquid?

 

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