# Electric current and magnetic field

Real time physics simulation showing Relation between electric current and magnetic field.
This simple simulation shows Relation between electric current and magnetic field.

Magnetic Field

Magnetic fields are produced by electric currents. The magnetic field B is defined in terms of force on moving charge in the Lorentz force law. Magnetic field sources are essentially dipolar in nature, having a north and south magnetic pole. The SI unit for magnetic field is the Tesla, which can be seen from the magnetic part of the Lorentz force law

Fmagnetic = qvB to be composed of (Newton x second)/(Coulomb x meter). A smaller magnetic field unit is the Gauss (1 Tesla = 10,000 Gauss).

where
V-is velocity of the electric charge, measured in metres per second
X indicates a vector cross product
c is the speed of light measured in metres per second
E is the electric field measured in newtons per coulomb or volts per metre

Following Flash animation demonstrate the relation between current and magnetic field. Higher current will generate larger magnetic field.

Video