A tuning fork of frequency 392 Hz, resonates with 50 cm length of a st – McqOptions

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1.	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 [BHU 2004]
A.	4
B.	6
C.	8
D.	12
Answer» D. 12

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