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Q.

A pendulum clock made of invar has a period of 0.5s at 20OC. If the clock is used in a climate where average temperature is 30OC , how much fast or slow will the clock run in 106 seconds?αinvar =10−6C−1

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a

5 seconds fast

b

10 seconds fast

c

10 seconds slow

d

5 seconds slow

answer is D.

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Detailed Solution

ΔTT=12∝ΔT ∴ Total change =12×α×Δt×106=12×10−6×10×106=5 sec slow
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A pendulum clock made of invar has a period of 0.5s at 20OC. If the clock is used in a climate where average temperature is 30OC , how much fast or slow will the clock run in 106 seconds?αinvar =10−6C−1