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A source frequency f gives t beats when ...

A source frequency f gives t beats when sounded with a frequency 200Hz. The second harmonic of same source gives 10 beats when sounded with a source of frequency 420Hz. The value of f is

A

`200 s^(-1)`

B

`205 s^(-1)`

C

`195 s^(-1)`

D

`210 s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Here, `n = 200 +- 5 and 2n = 420 +- 10`. This is possible only when `n = 200 + 5 = 205 s^(-1)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE MOTION-Exercise 1
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