A wave pulse is traveling in the $- \hat { j }$ direction while its magnetic field is in the $- \hat { k }$ direction. The electric field is in the
A) $- \hat { i }$ direction.
B) $ \hat {j }$ direction.
C) $\hat { k }$ direction.
D) $- \hat { k }$ direction.

Question

Quizplus · Accepted Answer

The direction of the electric field ($\vec{E}$), magnetic field ($\vec{B}$), and the direction of wave propagation ($\vec{v}$) are related by the right-hand rule. Given that the wave propagates in the $-\hat{j}$ direction and the magnetic field is in the $-\hat{k}$ direction, using the right-hand rule, the electric field must be in the $-\hat{i}$ direction to satisfy $\vec{E} \times \vec{B} = \vec{v}$.

A Wave Pulse Is Traveling in The −j^- \hat { j }−j^​

A Wave Pulse Is Traveling in The $- \hat { j }$