Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-fact-Hard-Class 12
What is the direction of the magnetic field B in a plane electromagnetic wave if the electric field E is directed along the y-axis and the wave propagates along the x-axis?
A
z-axis
B
y-axis
C
x-axis
D
negative z-axis
Correct Answer
Option A
Detailed Explanation
In a plane electromagnetic wave, if the electric field E is along the y-direction and the wave propagates along the x-axis, the magnetic field B must be perpendicular to both E and the direction of propagation, which is along the z-axis.
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