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1. The derived unit of pressure can be expressed as

A. $kg ms^{-2}$
B. $kgm^{-1}s^2$
C. $kg m^{-2}s^{-2}$
D. $kg m^{-1}s^2$

2. Skipped, has a diagram

3. Which of hte following devices is used to determine the relative density of an acid?

A. Manometer
B. Hydrometer
C. Hypsometer
D. Hygrometer

4. A block of wood of density $0.6cm^{-3}$, weighing 3.06 N in air, floats frreely in a liquid of density $0.9gcm^{-3}$. Calculate the volume of the portion immersed. (g = $10cmms^-2$)

A. $510cm^3$
B. $340cm^3$
C. $254cm^3$
D. $170cm^3$

5. A metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained, then

A. W>U+V
B. W = U+V
C. W = U-V
D. W < U+V

6. Which of the following substances is the most volatile at room temperature?

A. Water
B. Diesel
C. Petrol
D. Kerosene

7. The movement of fluid up or down a narrow tube is

A. Osmosis
B. BRownian motion
C. Capillarity
D.Diffusion

8. A bird flies at $10ms^{-1}$ for 3s, 15ms^{-1} for $3s$ and $20ms^{-1}$ for 4s. Calculate the bird’s average speed

A. 4.5$ms^{-1}$
B. 15.0$ms^{-1}$
C. 15.5$ms^{-1}$
D. 51.7$ms^{-1}$

9. See pages for figures

10. The time of flight for a projectile motion is given by the expression

A. U sinθ / g
B. U sin θ / 2g
C. 2U sinθ / g
D. U sin 2θ / g

11. An object is dropped from the top of a tower. If it takes 4s for it to reach the ground, calculate the height of the tower. (g = 10$ms^-2$, ignore air ressitance)

A. 20m
B. 40m
C. 80m
D. 160m

12. When a body is slightly tilted, it is found that its centre of gravity is slightly raised. What is the state of equilibrium of the body?

A. Unstable
B. Stable
C. Neutral
D. Cannot be determined

13. A simple pendulum makes 50 oscillations in one minute. Determine its period of oscillation

A. 0.04s
B. 0.83s
C. 1.20s
D. 50.00s

14. The tendency for a stationary body to continue to remain at rest when a force is applied to it is known as

A. Friction
B. Impulse
C. Inertia
D. Momentum

15. A resultant force of magnitude 15 N acts on a body of mass 250g. Calculate the magnitude of the acceleration

A. 0.06$ms^{-2}$
B. 3.75$ms^{-2}$
C. 16.67$ms^{-2}$
D. 60.00$ms^{-2}$

16. A girl stands on a scale in a lift. If the reading on the scale is less than her weight, then the lift is moving

A. Upward at uniform speed
B. Upward with uniform acceleration
C. Downward with uniform speed
D. Downward with uniform acceleration

17. The S.I. unit of heat is

A. Joule
B. Kelvin
C. Watt
D. Ampere

18. A body is pulled through a distance of 500m by a force of 20N. If the power developed is 0.4kW, calculate the time for which the force acts

A. 250.0s
B. 25.0s
C. 2.5s
D. 0.5s

19. A metal sheet of area $100cm^2$ was heated through $70^oC$. Calculate its new area if the linear expamsitivity of the metal is 0.000017 $K^{-1}$

A. 100.06$cm^2$
B. 100.12$cm^2$
C. 100.24$cm^2$
D. 100.36$cm^2$

20. The thermophile is a device for detecting

A. Radioactive radiations
B. Radiant energy
C. X-rays
D. The presence of electrons
21. In the formation of sea breeze, wind blows from

A. Sky to land
B. Sea to sky
C. Land to sea
D. Sea to land

22. A piece of copper of mass 20g at a temperature of $110^oC$ was dropped into a mixture of ice and water at $0^oC$. If the final steady temperature of the mixture is $0^oC$, calculate the amount of ice that melted. (Specific heat capacity of copper = $0.4 Jg^{-1}K^{-1}$; Specific latent heat of fusion of ice = $330Jg^{-1}$)

A. 0.37g

B. 0.60g
C. 2.40g
D. 2.70g

23. Which of the following factors decreases the rate of evaporation of a liquid?

A. Increase in pressure over the liquid
B. Lowering the boiling point
C. Decreases in humidity
D. Wind

24. When two waves are superimposed on each other, the following occurences are possible, except

A. Nodal lines
B. Anti nodal lines
C. Stationary waves
D. Dispersion

25. Which of the following properties of waves is exclusive to transverse waves?

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

26. An object of height 2.5cm is placed 20cm from a convex mirror of focal length 10cm. Calculate the height of its image

A. 2.5cm
B. 3.0cm
C. 5.0cm
D. 25.0cm

27. A ray of light passes from air to water to glass to air. Given that the refractive index for light passing from air to water is 4/3 and air to glass is 3/2, calculate the refractive index of glass relative to water

A. 0.50
B. 0.67
C. 0.75
D. 1.13

28. An object is placed at a point X between the focal point F and the optical centre C of a diverging lens. If F’ is the focal point on the other side of the lens, the image of the object is formed between

A. F and X
B. X and C
C. C and F’
D. F’ and 2F’

29. An object is placed 10cm from a converging lens of focal length 15cm. Calculate the magnification of the image formed.

A. 3.0
B. 1.5
C. 0.6
D. 0.3

30. A telescope is said to be in normal adjustment when the

A. Focal length of objective is greater than that of the eyepiece
B. Focal length of the eyepiece is greater than that of the objective
C. Focal length of the eyepiece is equal to that of the objective
D. Objective focal point coincides with that of the eyepiece

31. The sound heard by a person after the reflection of the sound generated by him is called

A. Reverberation
B. Resonance
C. Echo
D. Audibility

32. Which of the following sets of coloured light is/are secondary colors? I. Red, Blue and Green II. Blue, Cyan and magenta III. Green, Magenta and Yellow IV. Yellow, Cyan and Magenta

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

33. See pages for figures

34. When two like charges are brought together, the potential energy of the system formed will

A. Increase because work is done against the field
B. Increase because work is done by field
C. Decrease because work is done by the field
D. Decrease because work is done against the field

35. Two capacitors, each of the capacitance 2µF are connected in parallel. If the p.d across them is 120V, calculate the charge on each capacitor

A. 6.0 x $10^{-5}C$
B. 1.2 x $10^{-4}C$
C. 2.4 x $10^{-4}C$
D. 4.8 x $10^{-4}C$

36. Which of the following properties is an advantage of a lead-acid accumulator over an alkaline accumulator?

A. Possesses low internal resistance
B. Can be recharged
C. Has shorter life span
D. Possesses higher emf

37. Six dry cells each of emf 2.0V and internal resistance of 1.0Ω are connected in parallel across a load of 3.0Ω. Calculate the effective current in the circuit

A. 0.63A
B. 0.50A
C. 0.31A
D. 0.22A

38. See pages for figures

39. A 12Ω resistor dissipates 8kJ of heat in 20s. Calculate the current through the resistor

A. 5.8A
B. 6.9A
C. 30.0A
D. 33.3A

40. See pages for figures

41. The magnetic relay is a device used for

A. Timing in sports
B. Storing magnetic fields
C. Reading the magnitude flux
D. Controlling another circuit carrying larger current

42. The core of a transformer is usually laminated inorder to

A. Reduce magnetic flux breakage
B. Reduce eddy current
C. Prevent vibration of the transformer
D. Make magnetic reversal in the core much easier

43. Which of the following modes is the most economical method of transmitting electrical power over long distances?

A. Alternating current at low voltage and high current
B. Alternating current at high voltage and high current
C. Alternating current at high voltage and low current
D. Direct current at low voltage and high current

44. An inductor is connected to a 24V, 50 Hz mains supply. If the current through the inductor is 1.5A, calculate the inductance of the inductor. (π = 22/7)

A. 8.0 x $10^2H$
B. 7.5 x $10^0H$
C. 1.6 x $10^0H$
D. 5.1 x $10^{-2}H$

45. in a R-C circuit

A. $I_{mms}$ leads $V_{mms}$ by $60^o$
B. $I_{mms}$ lags $V_{mms}$ by $60^o$
C. $V_{mms}$ lags $I_{mms}$ by $90^o$
D. $V_{mms}$ leads $I_{mms}$ by $90^o$

46. An atom in an excited state is one whose

A. Potential energy is minimum
B. Potential energy is maximum
C. Electrons are in the conduction band
D. Electrons have moved to higher energy level

47. A metal with a work function of 3.0eV is irradiated with Ultraviolet light of energy 4.0eV, the kinetic energy of the ejected electron is

A. 1.0eV
B. 3.0eV
C. 4.0eV
D. 7.0eV

48. Which of the following statements about X-rays is correct? X-rays

A. Are produced when a meatl surface is irradiated with Ultraviolet light
B. Are produced when a metal target is used to block fast moving electrons
C. Have long wavelengths and are therefore very penetrating
D. Are not part of the electromagnetic spectrum

49. Which of the following arrangements of radiations is in the order of decreasing power?

A. α, β, ϒ
B. α, ϒ, β
C. β, ϒ, α
D. ϒ, β, α

50. Which of the following radiations emitted in radioactive decay has momentum, a fairly high penetrating power and is deflected by a magnet?

A. Alpha particle
B. Beta particle
C. Gamma radiation
D. X-radiation