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A student performed an experiment to mea...

A student performed an 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 pongs of the tunning 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 1cm

D

the length of the air column at the first resonance was somewhat shorter than 1/4th of the wave length of the sound in air

Text Solution

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The correct Answer is:
A, D
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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,

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