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0 votes
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in Physics by (91.1k points)
A clock while keeps correct time at `30^(@)C` has a pendulum rod made of brass. The number of seconds it gains (or) looses per second when the temperature falls to `10^(@)C` is [`alpha` of brass `= 18 xx 10^(-6//@)C`]
A. `18 xx 10^(-6) sec`
B. `18 xx 10^(-5) sec`
C. `0.0018 sec`
D. `0.018 sec`

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1 Answer

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by (91.6k points)
Correct Answer - B
`(DeltaT)/(T) = (1)/(2)alphaDeltat`

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