Physics - Sound Wave Question with Solution | TestHub
PhysicsSound Wave302Hard2 minQB
PhysicsHardsingle choice
Passage / Comprehension
A cylindrical block of density 2 gm/cc is suspended by a thin wire 3m long. When the wire is vibrated, it produces fundamental frequency of 280 Hz. The mass of wire is so small that tension in the wire can be assumed to be constant. Now the block is dipped in a liquid. It is found that the first overtone now is 280 Hz.\\
What is the density of the liquid?
Options:
Answer:
B
Solution:
First overtone after dipping = 280 Hz, so new fundamental = 140 Hz: tension halves... \sqrt{\frac{\rho vg}{\mu}}} \propto 2 gives
Answer (B)
Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:302
⏱ 2mℹ️ Source: QB
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