21. 
- A. 80µF
- B. 6.0µF
- C. 4.0µF
- D. 2.0µF
22. The instrument used to measure the pressure of a gas is
- A. barometer
- B. thermometer
- C. hygrometer
- D. manometer
23. A radio station broadcast at a frequency of 600KHZ. If the speed of light in air is 3 × 108ms\(^{−1}\). Calculate the wavelength of the radio wave
- A. 2.20 × 10\(^3\)m
- B. 5.0 × 10\(^2\)m
- C. 5.0 × 10\(^5\)m
- D. 11.8 × 10\(^{11}\)m
24. Which of the following is a scalar quantity?
- A. Tension
- B. Weight
- C. Impulse
- D. Mass
25. Determine the focal length of a thin converging lens if the power is 5.0 dioptres
- A. 0.1 m
- B. 0.2 m
- C. 2.0 m
- D. 2.5 m
26. A string of length 5cm is extended by 0.04m when a load of 0.8kg is suspended at the end. How far will it extend if a force of 16N is applied? [g = 10ms−2]
- A. 0.04m
- B. 0.12m
- C. 0.01m
- D. 0.08m
27. How can energy loss be minimized through Eddy-current?
- A. By using high resistance wire
- B. By using insulated soft iron wires
- C. By using low resistance wires
- D. Bu using turns of wires
28.
- A. 4.0 x 10−2J
- B. 4.0 x 10−4J
- C. 8.0 x 10−4J
- D. 8.0 x 10−2J
29. A constant force of 5N acts for a 5 seconds on a mass of 5kg initially at rest. Calculate the final momentum
- A. 125kgms−1
- B. 25kgms−1
- C. 15kgms−1
- D. 0kgms−1
30.
I. Refraction
II. Interference
III. Diffraction
Which of the above properties are common to all waves?
- A. II and III only
- B. I, II and III
- C. I and II only
- D. I and III only
