Question

A fixed wire AB carries current I. An electron is moving parallel to the wire, in which direction does the electron tend to move?

Answer 1

By right-hand thumb rule, the magnetic field in the vicinity of wire is downward perpendicular to plane of paper. The conventional direction of electric current is opposite to the direction of motion of electron. By Fleming's left-hand rule, the force on electron is away from wire in the plane of paper; therefore, the electron will be deflected downward (away from wire) in the plane of paper.