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If an addition of 75 kg wt to the vibrating string rises the pitch is an octave of the original pitch, then the tension in the string isA. 50 kg wtB. 100 gk wtC. 75 kg wtD. 25 kg wt |
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Answer» Correct Answer - D `n_2/n_1 therefore (2n)/(n) = sqrt((T_1 +75)/(T_1))` `therefore 3T_1 = 75 therefore T_1 = 25` kg wt |
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