An induced e.m.f. (or induced current) isproduced across a conductor when it is exposed to a change in a magnetic field.The mathematical law that relates the changing magnetic field to the inducedcurrent (or the induced voltage) is called Faraday's Law. Lenzâs law describesthe magnetic flux through the circuit and gives the direction of the inducede.m.f. This gives rise to induced current which opposes the change in magneticflux. In the present setup, a permanent magnet falls with different velocitiesthrough a coil, the change in the magnetic flux generates an induced voltageimpulse. The induced voltage impulse is recorded with voltage probe through acomputer interface system. Depending on the polarity of the permanent magnetthe induced voltage impulse is negative or positive.