Magnetic Fields of Moving Charges

[ƒ(x)]

What does the magnetic field around a moving charge look like?

 

[diazona]

I did some hunting for a picture and here's the best I found:
http://webphysics.davidson.edu/Applets/Lorentz/Lorentz.html
http://www.phys.unsw.edu.au/PHYS1169/beilby/magnetism.html (~2/3 of the way down)

 

[astrokreng]

The magnetic field around a moving charge is a vector field that is perpendicular to the direction of motion of the charge. It forms a circular pattern around the charge, with the strength of the field decreasing as the distance from the charge increases. The direction of the magnetic field can be determined using the right-hand rule, where the thumb points in the direction of the charge's velocity and the fingers curl in the direction of the magnetic field lines. The strength of the magnetic field is also dependent on the speed of the moving charge and the distance from the charge. As the charge's speed increases, the magnetic field becomes stronger and more tightly curved. This phenomenon is known as the Lorentz force and is an important concept in electromagnetism. Understanding the magnetic field around a moving charge is crucial in many applications, such as in the design of electric motors and generators.