1. The equation below shows changes that occur when nuclide X decays to form Y
Which one of the following rations is emitted?
A. One alpha and two beta particles.
B. one beta and two alpha particles
C. two alpha particles and two beta particles
D. Two alpha particles.
2. A body accelerates uniformly from rest and acquires a velocity of 60 ms-1aftter half a minute. Find he distance covered by the body.
A. 15 m
B. 30 m
C. 900 m
D. 1800 m
3. Which one of the following liquid has abnormal expansion?
A. Water
B. Paraffin
C. Mercury
D. Alcohol
4. Pressure in liquid depends on
A. Density of the material.
B. Mass of the solid
C. Volume occupied.
D. Area of contact
5. In a cathode ray tube, the grid is the
A. Electron producer
B. Electron accelerator,
C. Brightness controller,
D. Beam deflector.
6. Which one of the following is an application of microwaves?
A. Cooking
B. Production of photography.
C. Finding flaws in metal
D. Sterilizing equipment.
7. The S.I unit of volume of liquid is
A. Liters
B. Meter cubed
C. Decimeter cubed
D. Milli litres.
8. The reluctance of a body to change its state of motion depends on its
A. Acceleration
B. Momentum
C. Velocity
D. Mass.
9. Image formed by diverging mirrors are
A. laterally inverted
B. Magnified
C. Virtual.
D. Real.
10. Which one of the produces e.m.f by heating?
A. Thermoelectric effect.
B. Piezoelectric effect
C. Photoelectric effect
D. Electromagnetic induction.
11. The hairs of a wet brush cling together because of
A. adhesion
B. Diffusion
C. Capillary
D. Surface tension.
12. Which one of the following is not a primary source of energy?
A. Dry cell
B. The sun
C. Water
D. Wind
13. A yellow object in red light appears
A. yellow
B. red
C. green
D. black
14. Which one of the following statements best explains what happens when a negatively charged cloud passes over the lighting conductor? The
A. Negative charges are attracted to the cloudland positive ions repelled to the spikes.
B. Positive ions are attracted to the cloud and negative charges are repelled onto the spikes
C. Negative charges are attracted from the earth to the spikes which causes ionization of air
D. Positive ions and negative ions are lost ton the earth.
15. An observer produces a sound and hears an echo after 6s.find a distance between the observer and the reflecting surface.(speed of sound =30)
16. Which one of the following gives the correct number of protons and electrons in the atom 
Protons Neutron Electrons
A. 6 14 6
B. 6 8 6
C. 8 6 6
D. 6 6 8
17. Constructive interference of waves occurs when the two waves are.
(i) in phase
(ii) moving in opposite directions.
(ii) Have the same wave length and frequency.
A. (i) only
B. (ii) only
C. (ii) and (iii) only
D. (i) and (iii) .
18.A current of 2 A flows through a bulb is 6 V, find the work done
A.120 J
B.30 J
C.3.3 J
D.1.2 J
19.Figure 1 shows changes by two devices P and Q
P and Q are
P Q
A. dynamo motor
B. battery dynamo
C. Battery motor
D. dynamo battery
20. A force of 120N increases length of an elastic string by 5 cm. Finds the force which increases the length by 2 cm.
A. 0.83 N
B. 4.80 N
C. 6.00 N
D. 10.00 N
21. When a wire carrying a current is placed between the poles of a magnet, it experiences a force due to the
A. Wire being attracted by the magnet
B. Attraction between the North Pole and South Pole.
C. Interaction between the current and the magnetic field.
D. Interaction between the magnetic field between the poles and the field around the wire.
22. The strength of abridge can be improved by
(i) Reinforcing the concrete to be used.
(ii) Designing a structure that is stronger in compression than in tension.
(iii) Designing the structure that is stronger in tension and compression.
A. (i) only
B. (ii) only
C. (i) and (ii) only
D. (i) and (iii).
23. A solid measures 5 cm by 4 cm by 10 cm. If the mass of the solid is 0.8 kg, find its density in kgm-3
24. Figure 2 shows a rigid body pivoted at S
Which of the forces O, P, Q and R gives the body an anti-clock wise moment?
A. R
B. Q
C. P
D. O
25 An object of height 4 cm is placed 20 cm from a convex lens. If the image formed is 6 cm high, find distance of image from the lens.
26. Soft iron is used in telephone ear piece because it
A. Loses magnetism easily
B. Gains magnetism easily
C. Gains and loses magnetism easily
D. Takes log to gain magnetism
27 .Figure 3 shows three force of 3 N, 4 N, and 13 N acting on a body,
Find the magnitude and direction of the resultant force.
A. 6 N in the direction of the 13 N force.
B. 8 N in the direction of the 3N and 4 N force
C. 20 N in the direction of the 13 N forces
D. 7 N in the direction of the 3 N and 4 N forces.
28. A car radiator is painted black and filled with water because.
(i) Block bodies are good absorbers of heat
(ii) Water facilities heat transfer by convection.
(iii)Water is a poor conductor on heat.
A. (i) and (ii) only
B. (i) and (iii) only
C. (iii) only
D. (ii) Only.
29. Figure 4 shows rectifiers R,1, R2, R3 and R4 Connected in a circuit
Through which of the rectifiers is current flowing?
A. R 1 and R2
B. R1 and R4
C. R2 and R4
D. R2 and R3
30. The temperature of 4kg of paraffin drops from 250C and 200C when it loses 44,000 J of heat. Find the specific heat capacity of paraffin
A. 5.50 X 102 Jkg-1k-1
B. 4.40 X 10 2 Jkg-1k-1
C. 2.44 X 102Jkg1 k-1
D. 2.20 x 103 Jkg-1 k
31. The mechanical advantage of a simple machine may be increased by
(i) increasing the load.
(ii) increasing the weight to movable parts of the machine.
(iv) Reducing friction between moving parts
A. (i) and (ii) only
B. (i) and (iii) only.
C. (ii) and (iii) only .
D. (i) only.
32. The cost of using an electric appliance for 2 hours is shs 16000. If each unit of electricity costs shs50, find the power rating of the appliance in kW.
33. A string was tuned to produce a note on a cold day. What adjustments should be made to make the string produce the same note on a hot day?
A. Tension in the string should be reduced
B. Length of the string should be increased.
C. length of the string should be reduced.
D. Length of the string should be increased and tension reduced.
34. Figure 5 shows forces of and w acting on body A falling freely in a fluid.
The body moves with a steady velocity when
A. F + W= U
B. U – F = W
C. U + W = F
D. U + F = W
35. Which one of the following explains the motion of smoke particles in an air cell? They
A. vibrates because they are being knocked by air molecules.
B. Vibrate because they are continuously colliding with each other.
C. Move about randomly because they are being knocked by air molecules
D. Move about randomly because they are continuously colliding with each other.
36. When cathode rays are passed between two identical plates, both connected to a negative voltage, a horizontal line is formed on the screen. This shows that, cathode rays
(i) Travel in a straight line
(ii) Are deflected only towards the positive plate in an electric field
(iii) Are not deflected when there is no electric field
A. (i) only
B. (iii) only.
C. (i) and (iii) only
D. (ii) and (iii) only
37. Figure 6 shows a cell of e.m.,f, E and internal resistance, r = 0.5 Ω connected to two 2 Ω resistors.
Find the value of E
A. 1.8 V
B. 2.4 V
C. 4.8 V
D. 5.4 V
38. Which of the following statements is correct about a step-up transformer? It
(i) Has more turns of wire in the secondary coil than in the primary.
(ii) Changes alternating voltages from higher to lower values.
(iii)Changes alternating voltages from lower to higher values.
A. (iii) only
B. (i) only
C. (ii) and (iii) only
D. (i) and(iii) only
39. A body of mass 3 kg is acted upon by a force of 20 N. If the opposing force is 5N,find the acceleration of the body.
A. 0.75ms-2
B. 5.0ms-2
C. 6.67ms-2
D. 8.30 ms-2
40. A car travelling at a speed of 72 kmh-1 overcomes a resistance of 30 N. Find the power developed by engine of the car in watts.
41. (a) What is meant by diffusion?
(b) State three factors which affect the rate of diffusion?
42. (a) Explain the difference between electric conductors and insulators.
(b) Describe how an electroscope is used to test whether a body is a good conductor or a good insulator
43. (a) Define density
(b) A measuring cylinder is filled with water to the 100cm3 mark; an irregular stone of mass 150 g is fully immersed into the water and the new level water become 175 cm3. Calculate the density of the stone.
(c ) State any two factors that can increase the stiffness of a string.
44.(a) What is meant by critical angle?
(b) (i) if the refractive index of water is 4/3 calculate the critical angle for water.
(ii)State one application of total internal reflection
45. (a) Define the following
(i) Work
(ii) Energy
(b) A pulley is used to raise a load of 40kg through 13m in 30 s. find the average power expended
46. Figure 7 shows essential parts of a refrigerator.
(a) Name the following sections
X
Y
(b) Explain the function Y in the cooling cycle
47, (a) Explain why alpha particles are more ionizing than beta particles
(b) Radiations consisting of alpha particles, beta particles, and gamma rays are released simultaneously from sources as shown in figure 8
What radiations will be detected?
(i) Between A and B?
(ii) Between B and C?
(iii) Beyond C?
48.(a) A sounding turning fork held above the tube as shown in figure 9 produces the first loud sound air column is 31cm above the water surface.(velocity of sound in air is 320 ms-1
Find the frequency of the turning fork
(b) Explain why nothing is heard when the length of the air column is less than 31cm.
49. (a) Figure 10 shows a pump used for inflating a bicycle tube
What happens when the handle is being pulled out wards?
(b) (i) State the principle of transmission of pressure in fluid
(ii) Why is air not suitable for transmitting pressure?
50.(a) Define electromotive force of a cell?
(b) List the defect of a simple cell
A charge of 20 C flows through a resistance of 5Ω in 8 s. find the potential deference across the resistance.