Magnetic Moment of Point Charge

[Invyz]

Say I have a stationary point charge with a matching charge moving past it at a velocity. What is the magnetic potential energy of the stationary point charge? The formula for magnetic potential energy involves pole strength so I am confused. I can calculate the B field the stationary particle feels but to get the potential energy I need to dot product with the magnetic moment.

 

[Simon Bridge]

How did you get on?

You can work out the magnetic field due to the moving charge at the position of the point charge.
But: does a stationary point electric charge feel a magnetic force?

note: a classical point charge does not have a magnetic dipole moment.