A tuning fork produces 4 beats per second with another tuning fork of frequency 256 Hz. The first one is now loaded with a little wax and the beat frequency is found to increase to 6 per second. What was the original frequency of the tuning fork ?
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The correct Answer is:
B
Frequency of first will decrease by loading wax over it. Beat frequency is increasing. Hence, `f_(2) gt f_(1)` or `f_(2) - f_(1) = 4` `:. f_(1) = f_(2) - 4 = 256 - 4` `= 252 H_(Z)`
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