A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature

A Black Body At 227c Radiates Heat At The Rate Physics QuestionA Black Body At 227c Radiates Heat At The Rate Physics Question

A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature of 727⁰C, the rate of heat radiated in the same units will be:

Options

(a) 50
(b) 112
(c) 80
(d) 60

Correct Answer:

112

Explanation:

According to Stefan’s law, E ∞ σT⁴, T₁ = 500 K T₂ = 1000 K
E₂ / E₁ = (T₂ / T₁)⁴ = (1000 / 500)⁴ = 16
E₂ = 16 x 7 = 112 cal/ cm²s

AddThis Website Tools
admin:

Related Questions

  1. Three capacitors 3μF,6μF and 6μF are connected in series to a source of 120V.
  2. Sodium and copper have work function 2.3 eV and 4.5 eV respectively
  3. Water rises to a height h in capillary tube. If the length of capillary tube above
  4. The cylindrical tube of a spray pump has radius R, one end of which has n fine holes,
  5. Two beams of light having intensities I and 4I interfere to produce a fringe pattern