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JEE PHYSICS MCQ: OSCILLATIONS

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A pendulum clock gains 5 seconds per day at a temperature of

15^{\circ} \mathrm{C}

and loses 10 seconds per day at a temperature

30^{\circ} \mathrm{C}

. At what temperature, the pendulum clock will neither gain nor lose time?

View answer and explanation

Correct option: B

20^{\circ} \mathrm{C}

Option A (

200\,\,J

) is correct because the total mechanical energy is calculated using the formula

\frac{1}{2}KA^2

.

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a

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{y_1}

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{U_1}

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{y_2}

its potential energy is

{U_2}

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\left( {{y_1} + {y_2}} \right)