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Saturday, 31 October 2026
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Physics Past Questions and Answers

Jamb 1988 Physics Questions

Question 21:
A slight loading of a tuning fork has the effect of
  • A Decreasing its amplitude
  • B Increasing its amplitude
  • C Decreasing its frequency
  • D Increasing its frequency
View Answer & Explanation
Question 22:
Two strings of the same length and under the same tension gives notes of frequencies in the ratio 4 : 1. The masses of the strings are in the corresponding ratio of
  • A 2 : 1
  • B 1 : 2
  • C 1 : 4
  • D 1 : 16
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Question 23:
To obtain a magnification of 2.5, how far should an object be placed from the pole of a thin converging lens of focal length 10.20m?
  • A 0.13m
  • B 0.25m
  • C 0.28m
  • D 0.50m
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Question 24:
An object is placed 10cm in front of a concave mirror of focal length 15cm. What is the position and nature of the image formed?
  • A 30cm and virtual
  • B 6cm and real
  • C 6cm and virtual
  • D 30cm and real
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Question 25:
Which of the following phenomena explains the formation of a mirage? i. Reflection ii. Refraction iii. Diffraction
  • A I and ii only
  • B Ii and iii only
  • C I and iii only
  • D I, ii, and iii only
View Answer & Explanation