A black metal foil is warmed by radiation from a small sphere at tempe – McqOptions

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1.	A black metal foil is warmed by radiation from a small sphere at temperature T and at a distance \[d\]. It is found that the power received by the foil is `P'. If both the temperature and the distance are doubled, the power received by the foil will be [MP PMT 1997]
A.	16P
B.	4P
C.	2P
D.	P
Answer» C. 2P

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