Transmission Of Heat Question 316
Question: Two black metallic spheres of radius 4m, at 2000 K and 1m at 4000 K will have ratio of energy radiation as
Options:
A) 1 : 1
B) 4 : 1
C) 1 : 4
D) 2 : 1
Show Answer
Answer:
Correct Answer: A
Solution:
$ \frac{Q _{1}}{Q _{2}}=\frac{r _{1}^{2}T _{1}^{4}}{r _{2}^{2}T _{2}^{4}} $
$ =\frac{4^{2}}{1^{2}}\times {{( \frac{2000}{4000} )}^{4}}=1 $
BETA
