Science
Electromagnetic induction.
Definition
Electromagnetic induction is the production of an electromotive force (voltage) across a conductor when it is exposed to a changing magnetic field. Discovered by Michael Faraday, this principle is the basis for electric generators and transformers.
Examples
Real-world.
- 1 Electric generators at power plants use spinning turbines in magnetic fields to induce current
- 2 Transformers use electromagnetic induction to step voltage up or down for power transmission
- 3 Wireless phone chargers use induction to transfer energy through changing magnetic fields
Key Fact
Faraday's Law: EMF = -NΔΦ/Δt, where N is the number of coil turns and ΔΦ/Δt is the rate of change of magnetic flux.