Electromagnetic induction

principle · 1831 · Industrial Revolution

A changing magnetic field induces a current in a conductor (Faraday).

Author: Michael Faraday.

Where it is used

Regenerative braking — is used in. Regeneration means the motor working as a generator, i.e. electromagnetic induction.
Electric generator — is used in. Turning a conductor in a magnetic field induces a current.
Ignition coil — is used in. The coil is a transformer that works by induction.
Alternating current — is used in. Alternating current is produced by induction generators.
Transformer — is used in. Induction between the windings.
Induction motor — is used in. The stator’s field induces current in the rotor.
Electricity meter — is used in. An induction meter has a rotating disc.
Inductor — is used in. A coil resists changes in current.
RFID — is used in. The tag gets energy from the reader’s field.
Pickup — is used in. A vibrating steel string induces a current in the coil.
Electric toothbrush — is used in. Wireless charging by induction.
Cochlear implant — is used in. The signal is passed through the skin by induction.
Wireless charging — is used in. Induction.
Dynamic microphone — is used in. A coil in a field.
Tesla coil — is used in. A transformer.
Alternator — is used in. It produces current by induction.
NFC — is used in. The phone's coil induces a current in the card's coil — electromagnetic induction.

Electromagnetism — evolved from. Faraday looked for the reverse of Ørsted’s discovery and found induction.
Electromagnetic waves — evolved into. Maxwell’s equations, which generalized induction, predicted electromagnetic waves.
Maxwell’s equations — evolved into. A generalization of Faraday.