A plane electromagnetic wave of frequency 25MHz travels in free space along the x-direction. At a particular point in space and time, →E=6.3^jV/m. What is →B at this point?
Open in App
Solution
The magnitude of B is
B = EC
= 6.33×108
= 2.1×10−8T
To find the direction, we note that E is along y - direction and the wave propagates along x - axis.
Therefore, B should be in a direction perpendicular to both x - and y - axes.
Using vector algebra, E × B should be along x - direction.