MHT CET Physics question
A tuning fork arrangement (pair) produces 4 beats/s with one fork of frequency 288 c.p.s. A little wax is placed on the unknown fork and it then produces 2 beats/s. The frequency of the unknown fork is
Answer: (B)
Solution
The unknown fork is 292 or 284 c.p.s.; waxing lowers its frequency, and the beats decrease to 2 only if it was 292 c.p.s. (falling
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