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Friday, 30 October 2026
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Physics Past Questions and Answers

Jamb 1988 Physics Questions

Question 16:
Which of the following properties is/are common to all waves? i. Diffraction ii. Refraction iii. Interference
  • A I only
  • B Ii only
  • C Ii and iii
  • D I, ii, and iii
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Question 17:
A piano wire 0.5m long has a total mass of 0.01kg and is stretched with a tension of 800N. Calculate the frequency of the wire when it sounds its fundamental note
  • A 200Hz
  • B 100Hz
  • C 4Hz
  • D 2Hz
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Question 18:
A note is called an octave of another note when
  • A Its frequency is twice that of the first note
  • B Its frequency is half of the first note
  • C The notes have the same fundamental frequency
  • D Its periodic time is twice that of the first note
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Question 19:
Which of the following factors affects the speed of sound in air? i. Temperature ii. pressure iii. Frequency
  • A I only
  • B Ii only
  • C I and ii only
  • D Ii and iii only
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Question 20:
The speed of sound in air at sea-level is 340ms-1 while that of light is 300 000kms-1. How far (to the nearest meter) from the center of a thunderstorm is an observer who hears a thunder 2s after a lightening flash?
  • A 170ms<sup style='font-size: smaller;'>-1</sup>
  • B 340ms<sup style='font-size: smaller;'>-1</sup>
  • C 600ms<sup style='font-size: smaller;'>-1</sup>
  • D 680ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation