Mathematical Tools Units & Dimensions Units Question 57
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) $ J,s $
Answer:
Correct Answer: B
Solution:
$ \frac{Q}{t}=\sigma AT^{4}\Rightarrow \sigma =J{{m}^{-2}}{{s}^{-1}}{{K}^{-4}} $