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A sonometer wire under a tension of N10N, produces a frequency of 250Hz...

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Question 614
A
39.2N
B
19.6N
C
14.2N
D
7.4N
E
5.1N
Explanation
f \(\alpha\) \(\sqrt{T}\)

\(\frac{f_1}{f_2} = \sqrt{\frac{T_1}{T_2}}\)

\(\frac{250}{350} = \sqrt{\frac{10}{T_2}}\)

\(\frac{5}{7} = \sqrt{\frac{10}{T_2}}\)

\(\frac{25}{49} = \frac{10}{T_2}\)

T2 = \(\frac{49 \times 10}{25} = 19.6\)

Correct option: B

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