NEET UG PHYSICS MCQ: WAVES

1 Medium

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Analyzing +4 | -1

A tuning fork

A

of frequency 512 Hz produce 5 beats/sec. When sounded with another tuning fork

B

of unknown frequency. If

B

is loaded with wax the numbers of beats is again 5 beats/second. The frequency of tuning fork

B

before it was loaded is:

View answer and explanation

Correct option: C

517 Hz

Option C (517 Hz) is correct because adding wax to tuning fork B decreases its frequency, and since the number of beats remained the same, the original frequency must have been higher than 512 Hz.

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