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Question

Three tuning fork of frequency 400 Hz, 401 Hz and 402 Hz are sounded simultaneously.the number of beats heard per second are :

A
1
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B
2
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C
3
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D
none of these
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Solution

The correct option is D 1
2 Hz and 1 Hz are sounded together giving 1 beats/s.
154330_139201_ans_294be23128c94fa9823330242f612b60.png

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