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1. A ball falling through a viscous liquid is acted upon by

A. Upthrust only
B. Upthrust and the ball’s weight
C. The ball’s weight and viscous force
D. Upthrust, the ball’s weight and viscous force

2. See pages for figures

3. When an elastic material is streched by a force, the energy stored in it is

A. Kinetic
B. Potential
C. Thermal
D. Electrical

4. If no net force acts on an object, the object maintains a state of rest or constant speed in a straight line. The above is a statement of Newton’s

A. First law of motion
B. Second law of motion
C. Third law of motion
D. Law of universal gravitation

5. See pages for figures

6. When the linear momentum of a body is constant, the net force acting on it

A. Is zero
B. Increases
C. Decreases
D. Remains constant

7. Which of the following pairs of physical quantities is made up of vectors?

A. Speed and displacement
B. Mass and force
C. Displacement and acceleration
D. Momentum and length

8. The knowledge of surface tension is applied in the following areas except in

A. Manufacturing of rain coats
B. Production of palm oil
C. Floating of a needle on water
D. Washing of plates with soapy water

9. A body is projected vertically upwards with a speed of $10ms^{-1}$ from a point 2m above the ground. Calculate the total time taken for the body to reach the ground[g= $10ms^{-2}$]

A. 1.00s
B. 2.00s
C. 2.18s
D. 3.00s

10. A car starts from rest and covers a magnitude of its acceleration

A. 0.25$ms^{-2}$
B. 0.80$ms^{-2}$
C. 3.20$ms^{-2}$
D. 4.00$ms^{-2}$

11. See pages for figures

12. The period of a simple pendulum X is 5s. What is the period of a simple pendulum Y which makes 50 vibrations in the same time it takes X to make 20 vibrations?

A. 12.5s
B. 2.5s
C. 2.0s
D. 1.2s

13. Alcohol of mass 21g and density 0.7$gcm^{-3}$ is mixed with 10g of water. Determine the density of the mixture. [Density of water = 1.0$gcm^{-3}$]

A. 0.775$gcm^{-3}$
B. 0.780$gcm^{-3}$
C. 0.875$gcm^{-3}$
D. 0.880$gcm^{-3}$

14. A device that converts mechanical energy into electrical energy is

A. A dynamo
B. An electric motor
C. An induction coil
D. A transformer

15. The SI unit of power is

A. N
B. Pa
C. W
D. J

16. A screww-jack has the distance between its successive threads as P and the length of its tommy bar as r. Its velocity ratio is given by the expression

A. 2πr^2/P
B. 2πr/P
C. 2π/rP
D. P/2πr

17. Heat transferby conduction is similiar to wave motion because

A. There is increase in temperature
B. Transfer of materials is involved
C. Charged particles vibrate at right angles
D. No transfer of materials is involved

18. The temperature at which the water vapour in the air saturates the air and begins to condense is known as

A. Dew point
B. Critical point
C. Boiling point
D. Triple point

19. The change of solid to liquid occurs

A. At constant temperature
B. When temperature is lower than the boiling point
C. When temperature is just near freezing point
D. When temperature is equal to the boiling point

20. Which of the following types of thermometers can be used to measure a range of temperatures from $-50^{o}C$ to $50^{o}C$.I. Clinical II. Mercury-in-glass III. Alcohol-in-glass

A. I only
B. II only
C. III only
D. I and II only

21. A body of mass Mkg rests on a plane inclined at an angle ϴ to the horizontal. The component of the weight of the body parallel to the plane is

A. Mg sinϴ
B. Mg cosϴ
C. Mg tanϴ
D. Mg secϴ

22. A quantity of water at $20^oC$ is mixed with another quantity of water at $70^oC$. The final steady temperature of the mixture is $40^oC$. Determine the ratio of the mass of the cold water to that of the hot water

A. 7:2
B. 3:2
C. 2:5
D. 1:2

23. The mass of an empty density bottle is 30g. When filled with a liquid, the mass of the bottle and the liquid is 40g. On heating the filled bottle through $40^oC$, the mass reduces to 38g. Calculate the apparent cubic expansitivity of the liquid.

A. 6.25 x $10K^{-1}$
B. 6.25 x $10^{-3}K^{-1}$
C. 2.50 x $10^{-3}K^{-1}$
D. 2.50 x $10^{-4}K^{-1}$

24. A car travelling at $30ms^{-1}$ overcomes a frictional resistance of 100N while moving. Calculate teh power developed by the engine. [1hp = 0.75kW]

A. 0.23hp
B. 0.40hp
C. 4.00hp
D. 4.40hp

25. The Quality of a note depends on its

A. Frequency
B. Pitch
C. Overtones
D. Amplitude

26. A tranverse wave can be distinguished from a longtitudinal wave

A. Diffraction
B. Reflection
C. Refraction
D. Polarization

27. The super position of waves to produce maximum or zero effect at a point is known as

A. Reflection
B. Refraction
C. Interference
D. Diffraction

28. Refraction of light differs from refelction in that, in refraction. I. At least two media are involved II. There is a change in the direction of the ray III. The speed of the ray changes. Which of the statement(s) above is/are correct?

A. I only
B. I and II only
C. II and III only
D. I and III only

29. Which of the following relations about the focal length $f_o$ of the objective and focal length $f_e$ of the eye piece of a compound microscope is correct?

A. $f_o = f_e$
B. $f_o < f_e$
C. $f_o > f_e$
D. $f_e = 2f_o$

30. The functional difference between a lens and a mirror is that a lens

A. Reflects a beam of light while a mirror refracts it
B. Refract a beam of light while a mirror reflects it
C. Absorbs incident rays while a mirror transmits them
D. Transmits

31. Skipped

32. An observer hears an echo 1.26 seconds after blowing a whistle near a cliff. Calculate the distance of the observer from the cliff.[Speed of sound in air = $330ms^{-1}$]

A. 104.0m
B. 207.9m
C. 415.8m
D. 523.8m

33. A fish inside a pond appears to be at a depth of 1.5m when viewed vertically from above. The refractive index of the water in the pond is 1.3. Calculate the apparent displacement of the fish.

A. 2.50m
B. 1.95m
C. 1.50m
D. 0.45m

34. An object is placed in front of two plane mirrors inclined at $60^o$ to each other. Determine the number of images formed

A.2
B. 3
C. 5
D. 7

35. An ammeter can be adapted to measure potential difference by using a

A. Shunt
B. Multiplier
C. Rheostat
D. Resistance box

36. The region around a magnet in which magnetic force can be experienced is known as

A. Declination
B. Flux density
C. Field
D. Flux

37. In an a.c. circuit, when the supply voltage frequency is equal to the resonant frequency, the current

A. Leads the supply voltage by $90^o$
B. Lags behind the supply voltage by $90^o$
C. Leads the supply voltage by $45^o$
D. Is in phase with the supply voltage

38. The energy stored in a simple cell is

A. Electrical
B. Nuclear
C. Thermal
D. Chemical

39. Which of following conditions occur at resonance in a series RLC circuit? I. Impedance equals resistance II. Current is maximum III. Reactants are maximum IV. Current and Voltage are $90^o$ out of phase

A. I and II only
B. I and III only
C. I, II and III only
D. I, II, III and IV

40. An electric motor converts

A. Electrical energy to mechanical energy
B. Mechanical energy to electrical energy
C. Mechanical energy to sound energy
D. Electrical energy to thermal energy

41. A 15µF capacitor is connected to a 240V, 50Hz A.C. source. Calculate the reactance of the capacitor. [π = 3.142]

A. 16Ω
B. 68Ω
C. 106Ω
D. 212Ω

42. See pages for figures

43. See pages for figures

44. A wire of length 100cm has a resistance of 10Ω. If its cross-sectional area is $0.005cm^2$, determine its resistivity.

A. 0.0005Ωcm
B. 0.0015Ωcm
C. 0.0016Ωcm
D. 0.0700Ωcm

45. A transformer has 400 turns of wire in the primary coil and 40 turns in the secondary coil. If the input voltage is 150 volts, calculate the magnitude of the output voltage.

A. 150V
B. 55V
C. 36V
D. 15V

46. See pages for figures

47. The energy required to separate the nucleus in an atom completely is known as

A. Mass defect of the atom
B. Electron binding energy
C. Excitation energy
D. Nuclear binding energy

48. Which of the follwowing statements is the major advantage of nuclear fusion over nuclear fission?

A. Nuclear fusion releases more energy
B. More neutrons are released in fusion than in fision
C. Fusion does not release as much dangerous radiation as fission
D. Fusion reactions occur more readily than fission

49. An aluminium foil is placed across a beam of radiation from a radioactive source. Which of the following types of radiation will be stopped by it?

A. Alpha and beta particles
B. Alpha and gamma particles
C. Beta and gamma particles
D. Gamma particles only

50. An element of nucleon number P and atomic number Q emits an alpha particle from its nucleus. The resultant numbers of the new element formed are respectively

A. P – 4 and Q + 2
B. P – 4 and Q – 2
C. P + 2 and Q +2
D. P + 2 and Q – 2