Electromagnetic Waves Question 8

Question 8 - 01 February - Shift 2

The ratio of average electric energy density and total average energy density of electromagnetic wave is:

(1) 2

(2) 1

(3) 3

(4) $\frac{1}{2}$

Show Answer

Answer: (4)

Solution:

Formula: Energy density

$<u_E>=<u_B>=\frac{1}{2}<u _{\text{total }}>$

So $\frac{\langle u_E\rangle}{\langle u _{\text{total }}\rangle}=\frac{1}{2}$