Optics Question 299

Question: In an electromagnetic wave, the electric and magnetising fields are $ 100V{{m}^{-1}} $ and $ 0.265A{{m}^{-1}} $ . The maximum energy flow is

[Pb. PMT 1997, 98]

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:

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}} $



NCERT Chapter Video Solution

Dual Pane