Question

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 frequency
• B. smaller time period
• C. larger velocity
• D. smaller wavelength

Answer 1

Answer: (C)

larger velocity

The velocity of sound V is directly proportional to the square root of the temperature. So if the temperature increases the velocity of the sound also increases. Option (c).

Since the frequency of the sound producing tuning fork is constant hence the frequency of the sound will also be constant. Also, the wavelength =(Sound velocity)/(Frequency). Thus the wavelength will also increase if the temperature increases. Option (a).

Since frequency is constant, Time period will also be constant.