Back to Directory
NEET PHYSICSHard

For a plane electromagnetic wave propagating in xx-direction, which one of the following combination gives the correct possible directions for electric field (EE) and magnetic field (BB) respectively?

A

j^+k^,j^+k^\hat{j} + \hat{k}, \hat{j} + \hat{k}

B

−j^+k^,−j^−k^-\hat{j} + \hat{k}, -\hat{j} - \hat{k}

C

j^+k^,−j^−k^\hat{j} + \hat{k}, -\hat{j} - \hat{k}

D

−j^+k^,−j^+k^-\hat{j} + \hat{k}, -\hat{j} + \hat{k}

Step-by-Step Solution

Direction of propagation of electromagnetic waves is along E⃗×B⃗\vec{E} \times \vec{B}. Given that direction of propagation is along xx-axis. Checking option (2): (−j^+k^)×(−j^−k^)=2i^(-\hat{j} + \hat{k}) \times (-\hat{j} - \hat{k}) = 2\hat{i}. This matches the propagation direction.

Practice Mode Available

Master this Topic on Sushrut

Join thousands of students and practice with AI-generated mock tests.

Get Started
Solved: PHYSICS Question for NEET | Sushrut