Question

If temp of hot body is raised by 5% then the heat energy radiated would increase by

Answer 1

1+de(E=(1+1.05)4
=1.2155_1=0.2155
=21.55%

Answer 2

E + dE/E = [T+5T/100]^4/T^4

1 + dE/E = [1+1.05]^4

= 1.2155 - 1 = 0.2155

= 21.55%