Electromagnetic Induction

If a wire passes through a magnetic field, a voltage is induced between the ends of the wire. If the wire is part of a circuit, a current flows. wire. magnetic field.
induced. The voltage induced is proportional to the length of the wire in the field (including loops, so that if two loops are in the field, the voltage and current are doubled), strength of the magnetic field, and the speed of the wire as it moves through the field.

Th direction of the induced current is given by Fleming's Right Hand Rule.
The rule implies that reversing either the movement of the wire or the direction of the magnetic field reverse the polarity of the induced voltage and the current.