# How are Electromagnetic forces created?

1. Jun 14, 2008

### understand.

How are Electromagnetic forces created by a current?

2. Jun 14, 2008

### Staff: Mentor

The current produces a magnetic field $\vec B$. If there is a net nonzero electric charge, then it produces an electric field $\vec E$ also. These fields produce magnetic and electric forces on nearby charges: $\vec F = q (\vec E + \vec v \times \vec B)$.