Calculate the quantity charge flowing through a conductor if a current of 10A passes through the conductor for 10s.

• A. 100°C
• B. 20°C
• C. 15°C
• D. 10°C

A gas which obeys Charles’ law exactly has a volume of 283cm³ at 10°C. What is its volume at 30°C?

• A. 142cm³
• B. 293cm³
• C. 303cm³
• D. 566cm³

A ball of mass 0.8 kg is dropped from a height, H. Just before hitting the ground, its velocity is 5.0 m/s. Determine H. [g = 10 ms^-2]

• A. 1.25m
• B. 4.00m
• C. 6.25m
• D. 1.60m

The anomalous expansion of water occurs in the range

• A. 0 °C to 100 °C
• B. 0 °C to 4 °C
• C. 4 °C to 100 °C
• D. -4 °C to 0 °C

The change of the direction of a wavefront as a result of a change in the velocity of the wave in another medium is called

• A. refraction
• B. reflection
• C. diffraction
• D. polarization

(a)(i) what is resonance?

(ii) State two eXwilples of resonance.

(iii) Differentiate between loudness and intensity of sound.

(b) When a ray is refracted through a rectangular glass prism, which of the following properties of the ray will change? Wavelength, frequency and speed.

(c)

(i) Copy the diagram below in your answer booklet.

(iii) On the copied diagram, sketch the pattern of the waves immediately after passing through the opening.

(d) A diverging lens of focal length 18.0 in is used to view a shark that is 90.0 in away from the lens. If the image formed is 1.0 m long, calculate the:

(i) image distance;

(ii) length of the shark.

The main purpose of the transformer in an a.c radio set is to?

• A) increase power to the radio
• B) step up the voltage
• C) convert energy from a.c to d.c
• D) step down the voltage

Charges on a conductor are

• A. evenly distributed over a surface of any shape
• B. concentrate on the inner surface of the conductor
• C. concentrate at the outer flat surface of the conductor
• D. generally concentrated at sharply curved surface

A car of mass 800kg attains a speed of 25m/s in 20secs. The power developed in the engine is?

• A. 1.25 x 10⁴W
• B. 2.50x⁴W
• C. 1.25 x⁶W
• D. 2.50 x⁶W

The Earth's magnetic equator passes through Jos in Nigeria. At Jos. the

• A. angle of variation is zero
• B. magnetic declination is 90°
• C. angle of dip is zero
• D. horizontal component of the Earth's magnetic field is zero