Question 2 — For a sound wave propagating - Questions at the end of the chapter - Chapter 10 - Sound Waves: Characteristics and Application (Exploration

Last updated at July 20, 2026 by

Question 2
For a sound wave propagating in a medium, increasing its frequency will increase its (i) wavelength (ii) speed (iii) number of compressions per second (iv) time period
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Answer: (iii)

  • Higher frequency = more oscillations per second = more compressions per second .
  • Speed depends on the medium (unchanged); wavelength and time period decrease as frequency rises.
Option
Effect of raising frequency
(i) wavelength
Decreases — v=λν with v fixed, so λ∝ 1/ν .
(ii) speed
Unchanged — speed depends only on the medium, not the source.
(iii) number of compressions per second
Increases — this is the frequency. Correct answer.
(iv) time period
Decreases — T=1/ν , so a higher frequency means a shorter period.
Back to: 10.6.1 Wavelength, frequency and time period
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