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Question

A tuning fork is vibrating with constant frequency and amplitude. If the air is heated without changing pressure the following quantities will increase

A
wavelength
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B
frequency
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C
velocity
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D
time period
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Solution

The correct options are
A wavelength
C velocity
Velocity of sound in air, vT
Temperature of air will increase as air is heated and hence its velocity increases.
Also from, v=νλ where ν=constant (given)
Thus, wavelength of sound waves also increases.

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