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CBSE Class 11-science Answered

(i)  A tuning fork T produces n beats/sec with another fork S whose frequency is known to be n1. When T is loaded with wax, the beat frequency decreases.  What is the frequency of T? (ii)  On loading T if the beat frequency increases, what will be the frequency of T?
Asked by Topperlearning User | 22 May, 2015, 05:00: PM
answered-by-expert Expert Answer

(i) The frequency of the fork T must be either (n1 + n) Hz or (n1 - n) Hz since n beats are produced initially.

When the fork is loaded with wax, its frequency is reduced.

Hence, if the fork had a frequency (n1 - n) Hz, then the beat frequency would have reduced.

So, the frequency of the unknown fork has to be (n1 + n) Hz.

 

(ii) Similarly, if the beat frequency increases then the frequency of fork T will be (n1 - n) Hz.

Answered by | 22 May, 2015, 07:00: PM
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