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Q.

A metallic wire with tension T and at temperature 300C vibrates with its fundamental frequency of 1 KHz. The same wire the same tension but at 100C temperature vibrates with a fundamental frequency of 1.001 KHz. The coefficient of linear expanasion of the wire is

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a

2 × 10-4/ºC

b

1.5 × 10-4/ºC

c

1× 10-4/ºC

d

0.5 × 10-4/ºC

answer is C.

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Detailed Solution

0.0011×100=-12α×-20×100
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