Which of the substances A, B and C has the lowest heat capacity, if heat is supplied to all of them at equal rates? The temperature versus time graph is shown:

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Solution

The correct option is A
A

Substance having more heat capacity takes longer time to get heated to a higher temperature and longer time to get cooled. If we draw a line parallel to the time axis, then it cuts the given graphs at three different points corresponding points on the time axis show that $t_{C} > t_{B} > t_{C}$ or $C_{C} > C_{B} > C_{A}$

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