Electromagnetic wave field directions · CAP 2013 #25
Physics · electromagnetism
Problem
An electromagnetic wave is propagating in vacuum in the positive z direction. At an instant when its magnetic field B at a certain position is in the positive x direction and getting stronger, what happens to its electric field E at that same position?
a) E is in the positive x direction and getting weaker.
b) E is in the negative x direction and getting stronger.
c) E is in the positive y direction and getting weaker.
d) E is in the negative y direction and getting stronger.
e) E is zero.