What is electromagnetic induction?
Electromagnetic induction is the process in which a current can be induced to flow due to a changing magnetic field is known as Faraday’s law of electromagnetic induction.
we looked at the force experienced by moving charges in a magnetic field. The force on a current-carrying wire due to the electrons which move within it when a magnetic field.
This process also works in reverse. Either moving a wire through a magnetic field or (equivalently) changing the strength of the magnetic field over time can cause a current to flow.
There are two key laws that describe electromagnetic induction:
Faraday’s First Law of Electromagnetic Induction
The discovery and understanding of electromagnetic induction are based on a long series of experiments carried out by Faraday and Henry.
According to the experiment,
The induction occurs due to when a conductor is place in the magnetic field it cuts the magnetic flux which can cause of induced current.
Faraday’s Second Law of Electromagnetic Induction
Faraday’s second law of electromagnetic induction states that.
“The induced emf in a coil is equal to the rate of change of flux linkage.“
Moreover, The flux is the product of the number of turns in the coil and the flux associated with the coil.
The negative sign indicate the direction of the induced emf and change in direction of magnetic fields have opposite signs.
Applications of Faradays Law
Following are the few applications:
- Electrical equipment like transformers work.
- Induction cooker works on the basis of mutual induction which is the principle of Faradays law.
- Generators are also works on the Faraday’s principle.
The most widespread version of Faradays law states:
The electromotive force around a closed path is equal to the negative of the time rate of change of the magnetic flux enclosed by the path