# Problem: A radio wave is traveling in the negative y-direction. What is the direction of E at a point where B is in the positive x-direction? A. −x-direction B. −y-direction C. +z-direction D. +y-direction E. +x-direction F. −z-direction

###### FREE Expert Solution

The direction of propagation:

$\overline{)\stackrel{\mathbf{⇀}}{\mathbf{d}}{\mathbf{=}}\stackrel{\mathbf{⇀}}{\mathbf{E}}{\mathbf{×}}\stackrel{\mathbf{⇀}}{\mathbf{B}}}$

-j = E × i

###### Problem Details

A radio wave is traveling in the negative y-direction. What is the direction of E at a point where B is in the positive x-direction?

A. −x-direction

B. −y-direction

C. +z-direction

D. +y-direction

E. +x-direction

F. −z-direction