Questions
A spherical black body with a radius of 12 cm radiates 440 W power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be
detailed solution
Correct option is D
Radiated power by blackbody P = Qt = AσT4⇒ P ∝ AT4 ∝ r2T4 ⇒ P1P2 = (r1r2)2(T1T2)4⇒ 400P2 = (126)2(5001000)4⇒ P2 = 1600 WTalk to our academic expert!
Similar Questions
For a black body at temperature 727°C, its radiating power is 60W and temperature of surrounding is 227° C. If temperature of black body is changed to 1227°C, then its
radiating power will be :
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