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Physics · 2016
JEE Main 2016 · 2016-04-03 Offline · Q7
A pendulum clock loses 12 s a day if the temperature is 40°C and gains 4 s a day if the temperature is 20°C. The temperature at which the clock will…
A pendulum clock loses $\displaystyle 12$ s a day if the temperature is $\displaystyle 40$°C and gains $\displaystyle 4$ s a day if the temperature is $\displaystyle 20$°C. The temperature at which the clock will show correct time, and the co-efficient of linear expansion $\displaystyle (\alpha)$ of the metal of the pendulum shaft are respectively :
Official answer
(1)
$\displaystyle 25^{\circ} \mathrm{C} ; \alpha=1.85 \times 10^{-5} /{ }^{\circ} \mathrm{C}$
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JEE Main 2016 Physics question, with the answer from NTA’s final answer key. Where our answers come from.