Home Physics Electromagnetic Wave General The electric and magnetic fields of an elect…
Physics Electromagnetic Wave General MCQ (Single Correct)

The electric and magnetic fields of an electromagnetic wave are :

A
in phase and parallel to each other
B
in opposite phase and perpendicular to each other
C
in opposite phase and parallel to each other
D
in phase and perpendicular to each other.

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Verified by Experts
The correct answer is:
D

The amplitudes of the electric and magnetic fields in free space are related by

In figure, electric field vector and magnetic field vector are vibrating along Y and Z directions and propagation of electromagnetic wave is shown in X-direction.

Hence, electric and magnetic fields are in phase and perpendicular to each other.

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