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Q.

A metal piece is heated to T1 K. The temperature of the surroundings is T2 K. The heat in the surroundings due to radiation is proportional to

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a

T14−T24

b

T1−T24

c

T14+T24

d

T13+T23

answer is A.

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Detailed Solution

E = σtA(T4-T4)  STEFAN BOLTZMANS LAWThe metal piece emits heat σT14 while it absorbs heat σT24 from surroundings. Hence heat in the surroundings due to radiation is proportional to T14−T24.
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