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For a black body at temperature 727^(@)C...

For a black body at temperature `727^(@)C`. If the temperature of the black body is changed to `1227^(@)C`, then its radiating power will be

A

304 W

B

320 W

C

240 W

D

120 W

Text Solution

Verified by Experts

The correct Answer is:
B
`60 =K(1000_(4)-500_(4))`....(i)
`E = K(1500_(4)-500_(4))`....(ii)
from (i) and (ii)
`(E)/(60)=(1500^(4) -500^(4))/(1000^(4)-500^(4))rArr E = 320`.
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