Em Waves Question 96
Question: In an electromagnetic wave, the electric and magnetic fields are $ 100,V{{m}^{-1}} $ and $ 0.265,A,{{m}^{-1}} $ . The maximum energy flow is
Options:
A) $ 26.5W/m^{2} $
B) $ 36.5W/m^{2} $
C) $ 46.7W/m^{2} $
D) $ 765W/m^{2} $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Here, amplitude of electric field, $ E _{0}=100,V/m $ amplitude of magnetic field, $ H _{0}=0.265,A/m $ . We know that the maximum rate of energy flow, $ S=E _{0}\times H _{0}=100\times 0.265=26.5,W/m^{2} $ .
BETA
