Question

What will be the increment in heat energy radiated when the temperature of hot body is raised by 5%?
A. 0.05
B. 0.06
C. 0.1165
D. 0.2155

Answer 1

(d) `(E+DeltaE)/E=([T+(5//100)T]^(4))/(T^(4))`
`(1+(DeltaE)/E)=(+0.05)^(4)=(1.05)^(4)`
`(DeltaE)/E=1.2155-1=0.2155`
`(DeltaE)/Exx100=0.2155xx100=21.55%`