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Q.

A uniform metal rod is used as a bar pendulum. If the room temperature rises by 10°C, and the coefficient of linear expansion of the metal of the rod is 2 x 10-6 / 0C, the period of the pendulum will have percentage increase of

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a

2 x 10-5

b

10-5

c

2 x 10-3

d

10-3

answer is D.

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Detailed Solution

ΔTT×100=12αΔθ×100=12×2×10−6×10100=10−3
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