2. Consider an infinite sheet of charge with charge density in the z - 0 direction with a speed v: I K y plane. The charge uniformly moves in the y Y You can think of this as a steady surface current K = ou. a) Determine the electric field and (using Ampere's law) the magnetic field generated by the infinite sheet. b) A point charge q moves with a velocity such that the total Lorentz force on q is zero. What is the minimum speed of q and in what direction should q move? Does your answer depend on the distance from the sheet? Does your answer depend on which side of the sheet q is located?