00:01
We know an electric field exerts force on stationary charge and a stationary charge exerts force on the electric field.
00:38
Now, we can say that the force field surrounding a stationary charge is known as the electrostatic field.
00:46
So the electrostatic field, we can say e, this would be given by, 1 over 4 pi times the permittivity of air and this would be multiplied by q the charge divided by r the distance from the source squared and so on a moving charge a magnetic force exerts a force rather we can say a magnetic field exerts a force and so we can say that then, again, the same thing.
01:43
The converse is true.
01:45
A moving charge exerts a force on a magnetic field, and a magnetic field exerts a force on a moving charge.
01:52
And we can say that then the force field, or essentially the magnetic field, is equalling the magnetic permeability of the vacuum divided by 4 pi, multiplied by q, the charge, times v, the velocity, times sign of 3 .5...