Transmission Of Heat Question 245
Question: The temperature of the body is increased from ?73 o C to 327 o C, the ratio of energy emitted per second is :
[CPMT 2001; Pb. PET 2001]
Options:
A) 1 : 3
B) 1 : 81
C) 1 : 27
D) 1 : 9
Show Answer
Answer:
Correct Answer: B
Solution:
Energy per second $ P( =\frac{Q}{t} )\propto T^{4} $
$ \frac{P _{1}}{P _{2}}={{( \frac{T _{1}}{T _{2}} )}^{4}}={{( \frac{273-73}{273+327} )}^{4}}={{( \frac{200}{600} )}^{4}}=\frac{1}{81} $
BETA
