Q216 / 225 · JEE Main 2002 · Physics

Two spheres of the same material have radii $1 \mathrm{~m}$ and $4 \mathrm{~m}$ and temperatures $4000 \mathrm{~K}$ and $2000 \mathrm{~K}$ respectively. The ratio of the energy radiated per second by the first sphere to that by the second is

  • Correct answer
    A
    1 : 1
  • B
    16 : 1
  • C
    4 : 1
  • D
    5 : 3

Solution

Energy radiated $\alpha R^2 T^4$

Hence, the correct answer is option: 'A'.

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