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1. |
Two spheres A and B of same material have radius 1 m and 4 m, and temperatures 4000 K and 2000 K respectively. Then the energy radiated by sphere A is |
A. | Greater than that of sphere B |
B. | Less than that of sphere B |
C. | Equal to that of sphere B |
D. | Two times that of sphere B |
Answer» D. Two times that of sphere B | |