Transmission Of Heat Question 210
Question: The temperatures of two bodies A and B are $ 727^{o}C $ and $ 127^{o}C $ . The ratio of rate of emission of radiations will be
[MP PET 1986]
Options:
A) 727/127
B) 625/16
C) 1000/400
D) 100/16
Show Answer
Answer:
Correct Answer: B
Solution:
$ \frac{E _{1}}{E _{2}}={{( \frac{T _{1}}{T _{2}} )}^{4}}={{( \frac{727+273}{127+273} )}^{4}} $
$ =\frac{{{(1000)}^{4}}}{{{(400)}^{4}}}=\frac{10^{4}}{4^{4}}=\frac{625}{16} $
BETA
