A plane electromagnetic wave of frequency 25 MHz travels in free space along the x-direction. At a particular point in space and time, E=6.3 j^V/m. What is Bat this point?

 The magnitude of the magnetic field will be given by the magnitude of the electric field divided by the speed of light. From the direction of the electromagnetic wave and the electric field we can find the direction of the magnetic field as they are mutually perpendicular to each other.

The magnitude of B is 

B = CE

= 6.3 /3×108

= 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.

since, ( + j ) ×(+k)=i,

so, B is along + k or the z – direction

so B = 2.1 × 10−8k

Getting Info...
Cookie Consent
We serve cookies on this site to analyze traffic, remember your preferences, and optimize your experience.
It seems there is something wrong with your internet connection. Please connect to the internet and start browsing again.
AdBlock Detected!
We have detected that you are using adblocking plugin in your browser.
The revenue we earn by the advertisements is used to manage this website, we request you to whitelist our website in your adblocking plugin.
Site is Blocked
Sorry! This site is not available in your country.