Question

What is the effect of a magnetic field on a stationary electric charge on a moving electric charge?

Answer 1

A stationary electric charge is not affected by a magnetic field, but a moving electric charge experiences a magnetic force.

Step-by-step explanation:

The effect of a magnetic field on a stationary electric charge is negligible. The magnetic force on stationary charges is zero.

However, a moving electric charge experiences a magnetic force when it interacts with a magnetic field. This force is perpendicular to both the velocity of the charge and the magnetic field.

For example, if you have a current-carrying wire in a magnetic field, the moving charges in the wire experience a force that causes the wire to move. This is the basis for the operation of electric motors and generators.

Answer 2

If we have a moving electric charge with the velocity v, then the magnetic field will produce a force F=q*v*B*sinθ where q is the charge, v is the velocity, B is the strength of the magnetic field and θ is the angle of the velocity and the magnetic field. The force will only change the direction of the charge, and it's magnitude will be the greatest when the velocity and the magnetic field are perpendicular to each other and no force will act on the charge if θ=0. If the velocity of the charge is 0, again there is no force on the charge. We can get the direction of the force with the right hand rule.