1992 WAEC SSCE Physics Past Questions

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1992

The image of a pin formed by a diverging lens of focal length 10cm is 5cm from the lens. Calculate the distance of the pin from the lens

1992

In an experiment to measure1 the focal length f of a converging lens object distances u and corresponding image distance were measured and 1/u plotted against 1/v to obtain the graph illustrated. How would f be determine…

1992

Which of the following statements is not correct for a light ray passing through a rectangular glass block which is surrounded by air? It

1992

A ray of light strikes a plane mirror at an angle of incidence i. Determine in terms of i the angle of deviation of the ray after reflection from the mirror.

1992

Which of the following is used for controlling the amount of light entering the eye?

1992

The eye defect illustrated in the diagram above can be corrected by a

1992

A real image of an object fom1ed by a converging lens of focal length 15cm is three times the size of the object. What is the distance of the object from the lens?

1992

As an object is moved close to the focus of a converging lens from infinity its image I. moves closer to the lens II. moves away from the lens. III. Remains the same size. IV becomes smaller. Which of the statements abov…

1992

How far from a cliff should a boy stand in order to hear the echo of his clap 0.9s later? (Speed of sound in air = 330 ms-1)

1992

Which of the following radiations have the highest frequency?

1992

The diagram above shows a waveform in which energy is transferred from A to B in a time of 2.5 x 10-3s. Calculate the frequency of the wave

1992

The angle of deviation of light of various colours passing through a glass prism decreases in the order of

1992

The diagram above shows the magnetic field around a bar magnet which has its N-pole pointing north. The neutral points in the field are likely to occur at

1992

A pipe closed at one end is 1.0m long. The air in the pipe is set into vibration and a fundamental note of frequency 85Hz is produced. Calculate the velocity of sound in the air. (Neglect end correction).

1992

Which of the following waves are longitudinal waves? l. Ripples on the surface of water II. Waves produced by a tuning fork vibrating in air III. Light wavesIV. Waves produced by a flute

1992

Calculate the time in which 4.8 kJ of energy would be expended when an electric heater of resistance 1.8 x 103Ω is used on a 240 V mains supply. (Neglect heat losses to the surrounding).

1992

In a domestic circuit, electrical appliances and lamps are arranged in parallel across the mains so as to enable the

1992

Calculate the length of a constantan wire of cross- sectional area 4 π x 10-8m2 and resistivity 1.1 x 10-6 Ω m required to construct a standard resistor of resistance 21 Ω. [Take π = 22/7]

1992

Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?

1992

Calculate the rate at which energy is used up in the circuit illustrated by the diagram

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