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Question

An accurate and reliable audio oscillator is used to standardise a tuning fork. When the oscillator reading is 514, two beats are heard per second. When the oscillator reading is 510, the beat frequency is 6 Hz. The frequency of the tuning fork is

A
516
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B
506
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C
510
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D
158
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Solution

The correct option is A 516
Beat frequency v=(v0514)=2
also
±(v0510)=6
Solving we get
v0=516 Hz

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