6. ELECTROMAGNETIC INDUCTION
Electromagnetic induction establishes the fundamental relationship between electricity and magnetism, as demonstrated by the experiments of Faraday and Henry. The chapter provides a detailed explanation of Faraday's laws of induction, the concept of magnetic flux, and the significance of inductance in electrical circuits, highlighting applications such as AC generators. The phenomenon not only serves theoretical interests but also plays a crucial role in modern technology, including the production of electric power.
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What we have learnt
- Electromagnetic induction involves generating electric current through a changing magnetic field.
- Lenz's law states that the induced current will oppose the change that produced it.
- Inductance quantifies the ability of a coil to induce electromotive force (emf) due to changing current either in itself or in a neighboring coil.
Key Concepts
- -- Electromagnetic Induction
- The process by which a changing magnetic field within a coil induces an electromotive force (emf) in the coil.
- -- Faraday's Law
- States that the induced emf in a circuit is directly proportional to the rate of change of magnetic flux through the circuit.
- -- Lenz's Law
- An induced current will flow in a direction that opposes the change in magnetic flux that produced it.
- -- Inductance
- A property of a coil that quantifies its ability to induce emf in itself or in a neighboring coil due to a change in current.
- -- Motional EMF
- The emf induced in a conductor moving through a magnetic field.
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