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To increase the frequency from 100 Hz to 400 Hz the tension in the string has to be changed by
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Correct option is B
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A wire having a linear density of 5 g/m is stretched between two rigid supports with a tension of 450 N. It is observed that the wire resonates at a frequency of 420 Hz. The next highest frequency at which the same wire resonates is 490 Hz. Find the length of the wire. (in m)
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