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A tuning fork of frequency 392 Hz , reso...

A tuning fork of frequency 392 Hz , resonates with 50 cm length of a string under tension ( T ). If length of the string is decreased by 2%, keeping the tension constant, the number of beats heard when the string and the tuning fork made to vibrate simultaneously is

A

4

B

6

C

8

D

12

Text Solution

Verified by Experts

The correct Answer is:
C
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