MHT CET · Physics · Waves and Sound
At poles, a stretched wire of a given length vibrates in unison with a tuning fork. At the equator, for same setting, to produce resonance with same fork, the vibrating length of wire
- A should be decreased.
- B should be increased.
- C should be same.
- D should be three times.
Answer & Solution
Correct Answer
(A) should be decreased.
Step-by-step Solution
Detailed explanation
\(f = \frac{1}{2L} \sqrt{\frac{T}{\mu}} = \frac{1}{2L} \sqrt{\frac{mg}{\mu}}\) \(f_{poles} = f_{equator} \Rightarrow \frac{1}{L_P} \sqrt{g_P} = \frac{1}{L_E} \sqrt{g_E}\)
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