A 2m long wire (with a resistance of 1 ohm per meter) runs horizontally, perpendicular to a 0. 1 Tesla magnetic field pointing up.
a) Suppose a single electron "travels" through the wire at 80% the speed of light. What is the force felt by the wire when the electron passes through the midpoint?
b) Now a 6V battery is attached across the wire. What is the new force on the wire?