Wave Mechanics Vibration Of String Question 42

Question: Two wires are producing fundamental notes of the same frequency. Change in which of the following factors of one wire will not produce beats between them

[BHU (Med.) 1999]

Options:

A) Amplitude of the vibrations

B) Material of the wire

C) Stretching force

D) Diameter of the wires

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Answer:

Correct Answer: A

Solution:

Change in amplitude does not produce change in frequency, $ ( n=\frac{1}{2l}\sqrt{\frac{T}{\pi r^{2}\rho }} ) $ .