Em Waves Question 107
Question: In a wave $ E _{0}=100,V{{m}^{-1}} $ . Find the magnitude of Pointing’s vector
Options:
A) $ 13.25W{{m}^{-2}} $
B) $ 26.5W{{m}^{-2}} $
C) $ 18.25W{{m}^{-2}} $
D) $ 19.7W{{m}^{-2}} $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ \vec{s}=\frac{E^{2}}{C{\mu _{0}}}=26.5,W{{m}^{-2}} $