Em Waves Question 32
Question: In an electromagnetic wave, the electric and magnetising fields are $ 100,V,{{m}^{-1}} $ and $ 0.265,A,{{m}^{-1}} $ . The maximum energy flow is
[Pb. PMT 1997, 98]
Options:
A) $ 26.5,W/m^{2} $
B) $ 36.5,W/m^{2} $
C) $ 46.7,W/m^{2} $
D) $ 765,W/m^{2} $
Show Answer
Answer:
Correct Answer: A
Solution:
Here $ E _{0}=100\ V/m, $
$ B _{0}=0.265\ A/m. $ \ Maximum rate of energy flow S = $ E _{0}\times B _{0} $ = $ 100\times .265=26.5\frac{W}{m^{2}} $
BETA
