### force on a charge in magnetic field

Posted:

**Sat May 01, 2010 10:50 pm**Hi,

It is said that for a force to be experienced on a charged particle in a magnetic field, the particle must have a velocity:

ie by the formula: F = qvBsin@.

Why is it that the particle has to have a velocity?

In the similar scenario of a electric field, the formula F=qE, the charged particle experiences a force even if it is stationary!

Why is the magnetic field different and why does it need a velocity?

Any thoughts,

Thanks

It is said that for a force to be experienced on a charged particle in a magnetic field, the particle must have a velocity:

ie by the formula: F = qvBsin@.

Why is it that the particle has to have a velocity?

In the similar scenario of a electric field, the formula F=qE, the charged particle experiences a force even if it is stationary!

Why is the magnetic field different and why does it need a velocity?

Any thoughts,

Thanks