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There are two spherical balls A and B of the same material with same surface ,but the diameter of A is half that of B.If A and B are heated to the same temperature and then allowed to cool ,then

There are two spherical balls A and B of the same material with same surface ,but the diameter of A is half that of B.If A and B are heated to the same temperature and then allowed to cool ,then 

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Grade:12th pass

1 Answers

Akash sharam
50 Points
27 days ago

Rate of heat transfer by radiation = A x T4 Temperature is same for both spheres A = Surface area Surface area of sphere = π d2 Cooling rate of big sphere / Cooling rate of small sphere = d2 big / d2small

Hence cooling rate will takes place in the ratio of 4 : 1

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