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Q.

If a string fixed at both ends having fundamental frequency of 240 Hz is vibrated with the help of a tuning fork having frequency 280 Hz, then the

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a

string will vibrate with a frequency of 260 Hz

b

string will vibrate with the frequency of tuning fork, but resonance condition will not be achieved

c

string will be in resonance with the tuning fork

d

string will vibrate with a frequency of 240 Hz

answer is C.

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Detailed Solution

If none of the natural frequencies of the string matches with the frequency of the source, then string will finally vibrate with the frequency of tuning fork, but here resonance condition would not be found.

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