Q.

The tension in a piano wire is 10N. What should be the tension in the wire to produce a note of double the frequency

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a

5 N

b

20 N

c

40 N

d

80 N

answer is C.

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Detailed Solution

n∝T⇒n1n2=T1T2⇒n2n=10T2⇒T2=40N
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