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A somometer wire produces 2 beats per second with a tuning fork, when the length of the wire is either 102cm or 104 cm . The frequency of the tuning fork isA. 206 HzB. 204 HzC. 200 HzD. 198 Hz |
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Answer» Correct Answer - A `n_1 gt n gt n_2` `n_1=n=2` `(n-n_2=2)/(n_1-n_2=4)` `n_1/n_2 = l_2/l_1= 104/102` `(n_1-n_2)/(n_2) = (104-102)/(102)` `(4)/(n_2) = 2/102` `n_2 = 102xx1=204` `n=n_2+2 = 204+2 = 206 Hz.` |
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