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A man has an antique pendulum clock of 1...

A man has an antique pendulum clock of 1832 which bears the signature of the purchaser. He does not want to replace it in the fond memory of his great-grandparents. It ticks off one second in each side to side swing. It keeps correct time at `20^(@)C`. The pendulum shaft is made of steel and its mass can be ignored as compared to the mass of the bob. Linear expansion coefficient of steel is `1.2xx10^(-5@)C^(-1)`
What is the fractional change in length if the shaft is cooled to `10^(@)C` ?

A

0.0001

B

`1.2xx10^(-2)%`

C

`1.2xx10^(-3)%`

D

`1.2xx10^(-4)%`

Text Solution

Verified by Experts

The correct Answer is:
B
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