Q1 of 118 Page 352

When you speak to your friend, which of the following parameters have a unique value in the sound produced?

When we speak there are different frequencies, wavelength, and amplitudes in the sound produced. The frequency and the wavelength changes with the pitch of the sound and the amplitude vary with the loudness. But the wave velocity remains the same in the air when the temperature is constant. Only option D is correct.

More from this chapter

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15

The change in frequency due to Doppler effect does not depend on

A. the speed of the source


B. the speed of the observer


C. the frequency of the source


D. separation between the source and the observer


 16

A small source of sound moves on a circle as shown in figure (16-Q1) and an observer is sitting at O. Let v1, v2, v3 be the frequencies heard when the source is at A, B and C respectively.


 2

An electrically maintained tuning fork vibrates with constant frequency and constant amplitude. If the temperature of the surrounding air increases but pressure remains constant, the sound produced will have

A. larger wavelength


B. larger frequency


C. larger velocity


D. larger time period


 3

The fundamental frequency of a vibrating organ pipe is 200 Hz.

A. The first overtone is 400 Hz.


B. The first overtone may be 400 Hz.


C. The first overtone may be 600 Hz.


D. 600 Hz is an overtone.