Properties Of Solids And Liquids Question 592

Question: 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 2×10−6per∘C , the period of the pendulum will have percentage increase of

Options:

A) −2×10−3

B) −1×10−3

C) 2×10−3

D) 1×10−3

Show Answer

Answer:

Correct Answer: D

Solution:

Fractional change in period ΔTT=12αΔθ=12×2×10−6×10=10−5 %

change=ΔTT×100=10−5×100=10−3

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