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Periodic Motion

Which of the ...

Question

Which of the following is not correct regarding the experiment to determine the velocity of sound in laboratory by resonance tube method?

A

the resonance tube apparatus should be kept inclined

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B

the turning fork should be struck gently against a soft rubber pad

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C

the vibrating tuning fork should be held horizontally over the open end of the tube

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D

the prongs of vibrating tuning fork should not touch the tube

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Solution

The correct option is B the resonance tube apparatus should be kept inclined
The length of the air column inside the resonance tube is determined by the amount of water kept in the tube.
If a water filled tube is inclined, the length of resonance column would be different at different lines parallel to the tube, and thus a number of resonating lengths would be created.

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Q. In Resonance tube experiment, if 400 Hz tuning fork is used, the first resonance occurs when length of air column in the tube is 19 cm. If the 400 Hz tuning fork is replaced by 1600 Hz tuning fork, then to get resonance, the water level in the tube should be further lowered by (take end correction = 1 cm)

Q. Consider the following statements regarding the experiment to the determine the velocity of sound in laboratory by resonance tube method.
1. The first resonance is obtained for the length

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