A pendulum clock keeps correct time at 0oC. Its mean coefficient of linear expansions is αoC, then the loss in seconds per day by the clock if the temperature rises by toC is
A
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B
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C
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D
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Solution
The correct option is B Loss in time per second △TT=12α△θ=12α(t−0) ⇒ loss in time per day △t=(12αt)t=12αt×(24×60×60)=12αt×86400