A negative particle with mass=m and charge=-Q orbits an infinitely long, positive line of charge having q/L=λ. The radius of the orbit is R. We than load ourselves and our instruments into a fast vehicle and drive at fix velocity, V, to the right, parallel to the line.
Determine the velocity vector of the line of charge and the particle relative to our vehicle.
Compute the direction and magnitude of the current we see due to the line.