Plane electromagnetic...|Electromagnetic Waves|JEE-Main-2019

JEE MAIN 2019

12-04-2019 S2

Question

A plane electromagnetic wave having a frequency $v=23.9 \mathrm{GHz}$ propagates along the positive z-direction in free space. The peak value of the electric field is $60 \mathrm{~V} / \mathrm{m}$. Which among the following is the acceptable magnetic field component in the electromagnetic wave?

Select the correct option:

$\vec{B}=60 \sin \left(0.5 \times 10^3 x+1.5 \times 10^{11} t\right) \hat{k}$

$\vec{B}=2 \times 10^7 \sin \left(0.5 \times 10^3 z+1.5 \times 10^{11} t\right) \hat{i}$

$\vec{B}=2 \times 10^{-7} \sin \left(0.5 \times 10^3 z-1.5 \times 10^{11} t\right) \hat{i}$

$\vec{B}=2 \times 10^{-7} \sin \left(0.5 \times 10^3 z+0.5 \times 10^{11} t\right) \hat{i}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution