Physics And Measurement Question 346
Question: Unit of Stefan’s constant is
[MP PMT 1989]
Options:
A) $ J{{s}^{-1}} $
B) $ J{{m}^{-2}}{{s}^{-1}}{{K}^{-4}} $
C) $ J{{m}^{-2}} $
D) $ Js $
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Answer:
Correct Answer: B
Solution:
$ \frac{Q}{t}=\sigma AT^{4}\Rightarrow \sigma =J{{m}^{-2}}{{s}^{-1}}{{K}^{-4}} $