JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

1 Easy

1 of 1

Application +4 | -1

A plane electromagnetic wave of frequency

35 {MHz}

travels in free space along the

X

-direction. At a particular point (in space and time)

\vec{E}=9.6 \hat{j} {~V} / {m}

. The value of magnetic field at this point is :

View answer and explanation

Correct option: D

3.2 \times 10^{-8} \hat{k}\, T

Option D (

3.2 \times 10^{-8} \hat{k}\, T

) is correct because the magnetic field is calculated using the relation E = cB, and the direction is determined by the cross product of the wave's propagation direction and the electric field direction.

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