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A student performed the experiment to me...

A student performed the experiment to measure the speed of sound in air using resonance air-column method. Two resonances in the air-column were obtained by lowering the water level. The resonance with the shorter air-column is the first resonance and that with the longer air-column is the second resonance. Then,

A

The intensity of the sound heard at the first resonance was more than that at the second resonance

B

the prongs of the tuning fork were kept in a horizontal plane above the resonance tube

C

the amplitude of vibration of the ends of the prongs is typically around 1 cm

D

the length of the air-column at the first resonance was some what shorter than 1/4th of the wavelength of the sound in air.

Text Solution

Verified by Experts

The correct Answer is:
A, D
For a longer air column, absorption of energy is more. Due to end correction `l + e = (lamda)/(4)`
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