A uniform metal rod is used as a bar pendulum. If the room temperature rises by 10oC and the coefficient of linear expansion of the metal of the rod is 2×10−6 per oC, the period of the pendulum will have percentage increases of
A
−2×10−3
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B
−1×10−3
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C
2×10−3
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D
1×10−3
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Solution
The correct option is D1×10−3 We know that, T=2π√lg