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Q.

A pendulum clock consists of an iron rod connected to a small heavy bob. The percentage change in time period if change in temperature of surrounding is 40°C (Take, α = 1.2 × 10–5/°C)

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a

0.048%

b

0.48%

c

0.024%

d

0.24%

answer is C.

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Detailed Solution

%ΔTT=12αΔθ×100%=12×12×10−510×40×100%=24×10−3%=0.024%
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