railway RRB Technician Grade 1 Mock Test 2024 Physics Thermal Properties of Matter Heat transfer

Two spheres of the same material and radii 5 m and 2 m are at temperatures 2000 K and 2500 K respectively. The ratio of energies radiated by them per second is

1

64 ∶ 25

2

36 ∶ 75

3

128 ∶ 625

4

16 ∶ 125

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