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A uniform metal rod is used as a bar pen...

A uniform metal rod is used as a bar pendulum. If the room temperature rises by `10^(@)C`, and the coefficient of linear expansion of the metal of the rod is `2 xx 10^(-6) per^(@)C`, the period of the pendulum will have percentage increase of

A

`-2xx10^(-3)`

B

`-1xx10^(-3)`

C

`2xx10^(-3)`

D

`1xx10^(-3)`

Text Solution

Verified by Experts

The correct Answer is:
D
Fractional change in period,
`(DeltaT)/T=1/2alpha Delta theta=1/2xx2xx10^(-6)xx10=10^(-5)`
`%"change"=(DeltaT)/T xx100=10^(-5)xx100=10^(-3)%`
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DC PANDEY-THERMOMETRY THERMAL EXPANSION AND KINETIC THEORY OF GASES-Check point 14.2
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  13. A metal rod of silver at 0^(@)C is heated to 100^(@)C . It's length is...

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  14. A uniform metal rod is used as a bar pendulum. If the room temperature...

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  16. Coefficient of volume expansion of mercury is 0.18xx10^(-3)//.^(@)C. I...

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  17. A glass flask of volume 200cm^(3) is just filled with mercury at 20^(@...

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