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Friday, 30 October 2026
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Physics Past Questions and Answers

Jamb 1992 Physics Questions

Question 16:
The space between the double glass walls of a thermos flask is evacuated space are silvered. The residual source of heat loss takes place by
  • A Convection
  • B Radiation from the surface
  • C Conduction through the stopper and the glass
  • D Conduction across the walls
View Answer & Explanation
Question 17:
The equation of a wave is y = 0.005 sin[x(0.5X - 200t)] where x and y are in meters and t is in seconds. What is the velocity of the wave?
  • A 4000ms<sup style='font-size: smaller;'>-1</sup>
  • B 400ms<sup style='font-size: smaller;'>-1</sup>
  • C 250ms<sup style='font-size: smaller;'>-1</sup>
  • D 40ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 18:
Which of the following characteristics of a wave is used in the measurement of the depth of the sea?
  • A Diffraction
  • B Interference
  • C Refraction
  • D Reflection
View Answer & Explanation
Question 19:
A note is the octave of another note if it has
  • A A frequency twice that of the first note
  • B Frequency half that of the first note
  • C The same fundamental frequency as the first one
  • D A frequency frequency eight times that of the first note
View Answer & Explanation
Question 20:
What is the frequency of the sound made by a siren having a disc with 32 holes and making 25 revolution per seconds?
  • A 80Hz
  • B 600Hz
  • C 800Hz
  • D 1600Hz
View Answer & Explanation