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Physics Wave and Sound Vibration of String MCQ (Single Correct)

If vibrations of a string are to be increased by a factor of two, then tension in the string must be made

A
Half
B
Twice
C
Four times
D
Eight times

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Text Solution

Verified by Experts
The correct answer is:
C

The frequency of vibration of a string is given by where l is length, T the tension and m the mass per unit length.

Given,

Hence, to increase n by a factor of 2 tension must increase four times.

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