Questions
A spherical black body with a radius of 12 cm radiates 450 W power of 500 K. If the radius were half and temperature doubled, the power radiated in watt would be
detailed solution
Correct option is D
We know that power radiated is given byP=σT44πT2∝T4r2∴ P2P1=T2T14r2r12=(2)4×122=4or P2=4P1=4×450=1800 wattTalk 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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