MHT CET 2025 Physics question
A tuning fork gives 5 beats per second with 40 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
For a sonometer wire . Shortening the wire raises its frequency. Let the fork frequency be and the wire frequency at 40 cm be . Since the beat frequency stays at 5 after the wire frequency increases, the wire must have been below the fork at first and above it afterwards: and
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account