Electromagnetism

The branch of physics that studies electric and magnetic fields and their interactions.

Articles with this tag: 5 Updated: August 23, 2026

Articles with this tag

Ampère's circuital law A basic law of electromagnetism linking the circulation of a magnetic field around a closed loop to the electric current it encloses, later extended by Maxwell to cover changing el…

Henry (unit) SI unit of electrical inductance, symbol H; measures how a changing current induces electromotive force. Named for Joseph Henry; related to volts, webers, and vacuum magnetic const…

Magnetic moment

Magnetic moment Quantity that characterizes the strength and orientation of a magnetic source; determines torque in external fields, energy, and dipolar field patterns across scales from electrons…

Undulator: periodic magnet device for bright, tunable synchrotron radiation Undulator An undulator is a periodic magnet insertion device that forces charged particles to oscillate and emit bright, narrow-band synchrotron radiation. This article explains operation, t…

Weber (unit) — SI unit of magnetic flux Weber (unit) The weber (Wb) is the SI derived unit of magnetic flux, equal to one volt-second. It relates to the tesla (Wb/m²), is named for Wilhelm E. Weber, and is used across electromagnetis…