Electromagnetic induction is a chapter in class 12 physics that deals with the phenomenon of generating an electromotive force (emf) across a conductor when it is placed in a varying magnetic field. This chapter covers topics such as Faraday’s law of electromagnetic induction, Lenz’s law, motional emf, eddy currents, and self-induction.
The importance of electromagnetic induction lies in its practical applications, such as generators, transformers, and electric motors. Generators are devices that convert mechanical energy into electrical energy by using electromagnetic induction, while transformers are used to transfer electrical energy from one circuit to another through the process of electromagnetic induction. Electric motors also work on the principle of electromagnetic induction, where a rotating magnetic field generates a current in a nearby conductor, causing the motor to turn.
Understanding electromagnetic induction is essential in many fields, including electrical engineering, electronics, and physics. It is also a fundamental concept in the study of electromagnetic waves, which has many applications in telecommunications, information technology, and medical imaging.