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Q.

Which one of the following is true for heat?


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a

Heat always flows from a colder object to a hotter object

b

Heat always flows from a hotter object to a colder object

c

Heat always flows in both the direction

d

Heat never flows from one object to other 

answer is B.

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Detailed Solution

Heat always flows from a hotter object to a colder object
By the second law of thermodynamics, the heat flows from a hot body to a cold body. The flow of heat remains until the temperature of both objects becomes equal. Heat transfer is the phenomenon of why we feel cold when we place some ice cubes in our hands.
 
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