A clock pendulum made of invar has a period of 0.5s at 200C. If the clock is used in a climate where average temperature is 300C, approximately. How much fast or slow will the clock run in 106sαinvar=1×10−6/0C?

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5 s

3 s

1 s

20 s

answer is A.

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Detailed Solution

∆time= 12α∆T t here t=106 sec

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