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Electromagnetic Induction 1 - Electromagnetic Induction Video Lecture - Class 12

FAQs on Electromagnetic Induction 1 - Electromagnetic Induction Video Lecture - Class 12

1. What is electromagnetic induction?

Ans. Electromagnetic induction is the process of generating an electromotive force (emf) or voltage in a conductor when it is exposed to a changing magnetic field. This phenomenon was first discovered by Michael Faraday in 1831.

2. How does electromagnetic induction work?

Ans. Electromagnetic induction works based on Faraday's law of electromagnetic induction. When a conductor is exposed to a changing magnetic field, the magnetic field lines cut across the conductor, which induces an emf or voltage in the conductor. This induced voltage can then drive an electric current in the conductor if it forms a closed loop.

3. What are the applications of electromagnetic induction?

Ans. Electromagnetic induction has various practical applications in our daily lives. Some of the common applications include electric generators, transformers, induction cooktops, electric motors, and wireless charging systems. These devices utilize the principle of electromagnetic induction to convert mechanical energy to electrical energy or vice versa.

4. How is electromagnetic induction related to Faraday's law?

Ans. Electromagnetic induction is closely related to Faraday's law of electromagnetic induction. Faraday's law states that the magnitude of the induced emf in a circuit is directly proportional to the rate of change of magnetic flux through the circuit. The negative sign in the law indicates that the induced emf creates an opposing current, following Lenz's law.

5. Can you explain Lenz's law in the context of electromagnetic induction?

Ans. Lenz's law is a fundamental law in electromagnetism that describes the direction of the induced current in a conductor due to electromagnetic induction. According to Lenz's law, the direction of the induced current is such that it opposes the change in magnetic field that produced it. This law ensures the conservation of energy and is a consequence of the law of conservation of energy.

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Oct 02, 2025 Last updated

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