MHT CET 2026 Physics question
A tuning fork gives 5 beats per second with a 33 cm length of sonometer wire. If the length of the wire is shortened by 1 cm, the number of beats is still the same. The frequency of the fork is
Answer: (B)
Solution
The frequency of the sonometer wire is inversely proportional to its length (). Shortening the wire raises its frequency. Let the fork frequency be . For the beats to be 5 both before and after the frequency rise, the wire frequency must be below the fork's before and above it after:
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