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Q.

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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a

5 s

b

3 s

c

1 s

d

20 s

answer is A.

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Detailed Solution

∆time= 12α∆T t  here t=106 sec
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