The electric field in | Electromagnetic Waves| JEE-MAIN 2022

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JEE MAIN 2023

25-06-2022 S1

Question

The electric field in an electromagnetic wave is given by $\mathrm{E}=56.5 \sin \omega(\mathrm{t}-\mathrm{x} / \mathrm{c}) \mathrm{NC}^{-1}$. Find the intensity of the wave if it is propagating along $x$-axis in the free space. (Given $\varepsilon_0=8.85 \times 10^{-12} \mathrm{C}^2 \mathrm{~N}^{-1} \mathrm{~m}^{-2}$ )

Select the correct option:

A

$5.65 \mathrm{Wm}^{-2}$

B

$4.24 \mathrm{Wm}^{-2}$

C

$1.9 \times 10^{-7} \mathrm{Wm}^{-2}$

D

$56.5 \mathrm{Wm}^{-2}$

✓ Correct! Well done.

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