Consider an electromagnetic wave traveling in the positive y direction. The magn
ID: 2243671 • Letter: C
Question
Consider an electromagnetic wave traveling in the positive y direction. The magnetic field associated with the wave at some location at some instant points in the negative x direction as shown in the figure below. What is the direction of the electric field at this position and at this instant?
A)the positive x direction
B)the positive y direction
C)the positive z direction
D)the negative z direction
E)the negative y direction
Explanation / Answer
propagation has the direction of EXB
==> v=EXB
v is in y direction
Bis in -xdirection
so E must be -z direction
because (-k X -i) =j
D)the negative z direction