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 is
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 is
A. 50 kg wt
B. 100 gk wt
C. 75 kg wt
D. 25 kg wt
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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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