A prоtоn mоves with constаnt velocity v to the right through а region where there is а uniform magnetic field of magnitude B that points into the page. There is also an electric field in this region. The magnetic field and electric field are produced by devices not shown on the diagram. The proton moves straight because the magnetic force (FB = qvB is equal to the electric force FE = qE). What is the magnitude of the electric field? [Hint: Solve FB = FE] xx(1).png