frequency of a trimming fork is 512 Hz . How many oscillation will it perform in 10 seconds and what is its time period.
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Explanation:
The frequency of tuning fork, n
f
=512Hz
Beat frequency, x=4beats/sec
The beat frequency decreases to 2 beats per second, when the tension in the piano string is slightly increased.
We have to find the frequency of the piano, n
p
We have the equation,
n
p
=n
f
−x=512−4=508Hz
When tension is increased the frequency also increased. As number of beats decreased, the frequency of string must be less than 512 Hz.
Hence the correct answer is 508 Hz.
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