If the tempearture of black body is raised by `5%`, the heat energy radiated would increases by :

Options

A. `5%`
B. `20%`
C. `21.51%`
D. `41.61%`

Answer

C

Explanation

Acc. Of Stefan.s law
`(E_(2))/(E_(1))=((T_(2))/(T_(1)))^(4)`
`(E_(2))/(E_(1))=((105)/(100))^(4)=1*2158`
`:." "(E_(2))/(E_(1))-1=1*2155-1`
`rArr(E_(2)-E_(1))/(E_(1))xx100=*2155xx100=21*55%`
Thus correct choice is (c ).