8. Electromagnetic Induction
Electromagnetic induction describes how a changing magnetic field induces an electric current in conductors. Key principles include Faraday's laws of induction, which outline how electromagnetic forces are generated, along with Lenz's law, ensuring induced currents oppose the change in magnetic flux. The topic encompasses various applications, including generators, transformers, and the practical effects of eddy currents in numerous technologies.
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What we have learnt
- Electromagnetic induction is the process by which a changing magnetic field induces an electric current.
- Faraday's laws describe the principles of electromagnetic induction, highlighting how EMF is induced.
- Lenz's law asserts that induced currents oppose the change in magnetic flux that caused them.
Key Concepts
- -- Electromagnetic Induction
- The process by which a change in the magnetic field induces an electric current in a conductor.
- -- Faraday's Law of Induction
- A law stating that the induced EMF in a coil is proportional to the rate of change of magnetic flux.
- -- Lenz's Law
- A principle stating that the direction of induced current opposes the change in magnetic flux leading to it.
- -- SelfInduction
- The phenomenon where a changing current in a coil induces an EMF in itself.
- -- Mutual Induction
- The process by which a changing current in one coil induces an EMF in a nearby coil.
- -- Eddy Currents
- Circulating currents induced in conductors when exposed to changing magnetic fields, leading to energy losses.
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