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Monday, 17 August 2026
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Physics Past Questions and Answers

Topic: Waves

Jamb Physics Questions - Waves

Question 46:
A wave disturbance travelling in air enters a medium in which its velocity is less than that in air. Which of the following statements is true about the wave medium?
  • A Both the frequency of the wave and the wavelength are decreased
  • B The frequency of the wave is decreased while the wavelength is increased
  • C The frequency of the wave is unaltered while the wavelength is decreased
  • D The frequency of the wave is decreased while the wavelength is unaltered
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Question 47:
Which of the following is TRUE of light and sound waves?
  • A They both transmit energy
  • B They both need a mediumfor propagation
  • C They are both transverse waves
  • D Their velocities in air are equal
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Question 48:
Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced?
  • A 2Hz
  • B 4Hz
  • C 8Hz
  • D 258Hz
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Question 49:
A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill?
  • A 330.0m
  • B 335.4m
  • C 660.0m
  • D 670.8m
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Question 50:
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