Free Speed of Sound MCQs with Answers
49 Speed of Sound MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The speed of sound depends on the properties of the medium, including its elasticity and density, and in gases it varies mainly with temperature. Questions connect speed with frequency and wavelength, compare sound in solids, liquids and gases, and distinguish the speed of propagation from the oscillating particles' motion.
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49 questions · page 3 of 3
- A. 3.40m
- B. 2.94m
- C. 0.340m
- D. 0.294m
Explanation: According to the v=fλ v= 340m/s f= 1 x 103 Hz Hence λ= v/f = 340 / 1x103= 0.34 m (option C is the correct option)
Correct answer: 0.340m- A. 330m
- B. 100m
- C. 10m
- D. 1m
Explanation: Therefore, the correct option is "1m" as it represents a reasonable wavelength for audible sound produced by a tuning fork of frequency…
Correct answer: 1m- A. decreases
- B. increases
- C. does not change
- D. sometime decreases, some time increases
Explanation: Speed of sound does not depend on pressure of gas.
Correct answer: does not change- A. 1 : 1
- B. 4 : 1
- C. 1 : 4
- D. 3 : 1
Explanation: Air pressure has almost no effect on sound speed. It has no effect at all in an ideal gas approximation, because pressure and density both…
Correct answer: 1 : 1- A. Increasing
- B. Decreasing
- C. Same
- D. Different
Explanation: The radius(distance between observer and source) of the circle is the same at every point of the circumference.
Correct answer: Same- A. 150 s-1
- B. 300 s-1
- C. 600s-1
- D. None
Explanation: The speed of sound in air at NTP is a constant value i.e 300 ms-1 (it does not change) The speed of sound in a gas is independent of its…
Correct answer: 300 s-147. Laplace corrected Newton's formula for the velocity of sound in gas because the sound propagates:
- A. As longitudinal
- B. Adiabatically
- C. Isothermally
- D. Under isobaric conditions
Explanation: The transfer of energy is in the form of work done, during sound propagation so it is an adiabatic process
Correct answer: Adiabatically- A. 10 sec
- B. 1000 sec
- C. 1 day
- D. None of the above
Explanation: When a bomb explodes on the moon- due to the vacuum there is no medium for the propagation of sound and hence it cannot reach the earth
Correct answer: None of the above- A. 332 m/s
- B. 315 m/s
- C. 340 m/s
- D. 300 m/s
Explanation: When the wind is blowing in the opposite direction to the sound, it can affect the speed at which the sound waves reach the listener.
Correct answer: 315 m/s