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Question

The frequency of the sound produced by a vibrating wire decreases if its length is increased. State whether true or false.

A
True
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B
False
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Solution

The correct option is A True
v=fλ
where,
v Speed of the wave
f Frequency of wave
λ Wavelength
fα1λ
If frequency decreases, wavelength must increase. To increase the wavelength, the length of the wire must be increased.

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