1992 WAEC SSCE Physics Past Questions

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1992

What is the electric potential at a point distance r from a proton of charge q placed in a medium of permittivity εo?

1992

Calculate the energy stored in 20μF capacitor if the potential difference between the plates is 40 V.

1992

An element whose half-life is 3 years has N atoms. How many atoms would have decayed after 9 years

1992

A stream of alpha particles is projected into an electric field between two plates X and Y as shown in the diagram above. Which of the following is correct? The particles are

1992

Which of the following gives rise to the line spectra obtained from atoms?

1992

Which of the following statements is correct about cathode rays? They are fast moving

1992

lf the frequency of the a.c. circuit illustrated is 500Hz/ π what would be the reactance in the circuit?

1992

An elastic string of length l is elastically stretched through a length e by a force F. The area of cross- section of the string is A and its Young’s modulus is E. Which of the following expressions is correct?

1992

The process by which a metal, heated to high temperature, gives off electrons from its surface is known as

1992

A sheet of paper is placed in the path of a beam of radiations from a radioactive source. Which of the following radiations will pass through the paper?I. Alpha rays II. Beta rays III. Gamma rays

1992

When the nucleus of a uranium atom is split into two fragments of nearly equal mass, the sum of the masses of the fragments is less than the mass of the original nucleus. This difference is a measure of the

1992

Which of the following statements is not correct?

1992

Which of the following will reduce the frequency of oscillation of a simple pendulum?

1992

Images formed by a convex mirror are always

1992

(a) Explain what is meant by photoelectric emission(b) Draw a labelled diagram showing the structure of a simple type of a photocell and explain its mode of operation.(c) State four applications of photoelectric emission…

1992

(a) Draw a simple labelled diagram illustrating the principle of a step-down transformer and explain how it works (b) State three ways by which energy is lost in a transformer and how they can be minimized.(c) If a trans…

1992

(a)(i) What is meant by resonance?(ii) Outline the necessary steps taken in a simple experiment to illustrate tube resonance(iii) Explain why a vibrating tuning fork sounds louder when its stem is pressed against a table…

1992

(a) Explain what is meant by the following statement. The specific latent heat of fusion of ice is \(3.4 \times 10^{5}Jkg^{-1}\).(b) Describe an experiment to determine the specific latent heat of fusion of ice. State tw…

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