CUET · PHYSICS · PYQ PAPER 2025
A plane electromagnetic wave travels in vacuum along z-direction. What will be the directions of its electric field (\(\vec{E}\)) and magnetic field (\(\vec{B}\)) vectors?
- A \(\vec{E}\) and \(\vec{B}\) in y-z plane and are mutually perpendicular
- B \(\vec{E}\) and \(\vec{B}\) in x-z plane and are mutually perpendicular
- C \(\vec{E}\) and \(\vec{B}\) in x-y plane and are mutually perpendicular
- D \(\vec{E}\) and \(\vec{B}\) in x-z plane and are mutually parallel
Answer & Solution
Correct Answer
(C) \(\vec{E}\) and \(\vec{B}\) in x-y plane and are mutually perpendicular
Step-by-step Solution
Detailed explanation
Transverse Nature: EM waves are transverse in nature. This means that both \(E\) and \(B\) must be perpendicular to the direction of travel (the \(z\)-direction in this case). Vector Directions: If the wave travels along the \(z\)-axis, the \(E\) and \(B\) vectors must lie in…
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