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A circular metallic ring of radius R has a small gap of width d. The coefficient of thermal expansion of the metal is α in appropriate units. If we increase the temperature of the ring by a amount ∆T, then width of the gap – (A) Will increases by an amount dα∆T (B) Will not change (C) Will increases by an amojnt (2π R -d)α∆T (D) Will decrease by an amount dα∆T |
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Answer» Correct option (A) Will increases by an amount dα∆T Explanation: Will increases by an amount dα∆T |
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