Faraday's Law states that the induced electromotive force in any closed circuit is equal to the negative of the rate of change of the magnetic flux enclosed by the circuit.
On 29th August 1831, Faraday conducted the first experimental demonstration of electromagnetic induction, he wrapped two wires around opposite sides of an iron ring or. Based on his assessment of recently discovered properties of electromagnets, he expected that when current started to flow through one wire, a sort of wave would travel through the ring and cause an electrical effect on the opposite side.
He plugged one wire into a galvanometer, and watched it as he connected the other wire to a battery. Indeed, he saw a transient current (which he called a "wave of electricity") when he connected the wire to the battery, and another when he disconnected it This induction was due to the change in magnetic flux that occurred when the battery was connected and disconnected.
This discovery and application laid the foundations for many of our modern technologies.
Faraday's Law
