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Resultant Amplitude

An accurate a...

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 $v = (v_{0} - 514) = 2$
also
$\pm (v_{0} - 510) = 6$
Solving we get
$v_{0} = 516 H z$

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