Faraday's law of induction is a basic law of electromagnetism, which is involved in the working of transformers, inductors, and many forms of electrical generators.Electromagnetic induction was discovered by Michael Faraday in 1831, and, independently and at the same time, by Joseph Henry. The above law is sometimes also stated as - The EMF generated is proportional to the rate at which flux is linked.Traditionally, two different ways of changing the flux through a circuit are recognized. In the case of transformer EMF the idea is to alter the field itself, for example by changing the current originating the field (as in a transformer). In the case of motional EMF, the idea is to move all or part of the circuit through the magnetic field
Faradays law: When the magnetic flux through a loop changes with
time, an electric current is induced in the loop. Faradays law states that the induced electromotive force
(voltage) across the loop is minus the rate of change of flux.
Lenzs law: This law gives the direction of the induced current in
the loop due to a changing magnetic flux. It states that the current direction is such as to oppose the change in
flux. For example, if the flux is decreasing with time, the current direction will be so as to produce a magnetic
field in the same direction as the external magnetic field.
Faradays law provides the principle of operation of electrical
generators; by rotating a coil in a uniform magnetic field (the coil being placed between the poles of a large
magnet), a voltage (AC voltage) is induced across the coil.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.