SSC JE Mechanical Engineering 2017 Set 4 Paper

Question : 172 of 200

Marks: +1, -0

The total emissivity power is defined as the total amount of radiation emitted by a black body per unit.

Solution:

Total Emmisive power (E) is defined as the total amount of radiation emitted by a black body per unit area.

E={σT^4w}/m^2

σ = stefan boltzmann
constant

= 5.67 × 10^{–8} w\/m^2K^4

E_b=σAT^4

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