Transmission Of Heat Question 211
Question: The temperature at which a black body of unit area loses its energy at the rate of 1 joule/second is
Options:
A) $ -65^{o}C $
B) $ 65^{o}C $
C) 65 K
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
$ E=\sigma T^{4} $
Therefore $ 5.6\times {{10}^{-8}}\times T^{4}=1 $
Therefore $ T={{[ \frac{1}{5.6\times {{10}^{-8}}} ]}^{1/4}} $ =65 K
BETA
