Properties Of Solids And Liquids Question 462
Question: A black body is at $ 727{}^\circ C $ . It emits energy at a rate which is proportional to
Options:
A) $ {{(1000)}^{4}}(b) $
B) $ {{(727)}^{2}} $
C) $ 727{{)}^{4}} $
D) $ {{(727)}^{2}} $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] According to Stefan’s law, $ E\propto T^{4} $
$ \propto {{(t+273)}^{4}}K~[727{}^\circ C=(727+273)K] $
$ \propto {{(727+273)}^{4}}K $
$ \propto {{(1000)}^{4}}K $
