Question

Explain the Faraday’s Law of Electromagnetic Induction?

Answer 1

First of all we should know about the Electromagnetic Induction, Electromagnetic Induction or EMI is a current produced due to the production of the voltage (electromotive force) due to a changing magnetic field. This can be done either by moving the conductor in the magnetic field or by moving the magnetic field around the conductor.

Complete answer:
From the principles of electromagnetic induction, it states that the EMF which is mainly induced in a loop due to changing of magnetic flux is equal to the rate in the changes of the magnetic flux passing through the loop. The magnetic flux which passes through a coil of wire can be changed by moving a bar magnet in and out of the coil. Thus the formula used is, $emf\, = \, - N\dfrac{{d\phi }}{{dt}}$

This law says that an EMF is induced across the conductor when the magnetic field links with a conductor changes. A current flows through the circuit due to the induced EMF, if the conductor is the part of a closed circuit.The most important application of Faraday's Law of Induction is the transformer which is invented by great scientist Nikola Tesla. In this device, alternating current, which changes direction many times per second, is sent throughout the coil wrapped around a magnetic core.

Note: The main advantages of the Electromagnetic Induction are: AC or DC electrical power can be generated using only electromagnetic energy source. It eliminates the need of an external electrical source in order to generate electrical power.