310102iB 2 Magnetism, Electromagnetism and Electromagnetic Induction Part B 2017 (TF) (Self and Mutual Induction) 2017 (TF)

Electromagnetism

The branch of physics that deals with the interactions between electric charges and magnetic fields.

Lenz's Law

An induced EMF will cause a current to flow in such a direction that its magnetic effect opposes the change that produced it.

Electromagnet

A type of magnet formed by wrapping a wire around an iron or steel core, creating a magnetic field when current flows.

Induced Voltage

Voltage generated in a conductor due to a change in magnetic field or relative motion between the conductor and a magnetic field.

Faraday's Law of Induction

States that an EMF is induced in a coil whenever the number of lines of magnetic force threading through it changes.

Eddy Currents

Loops of electric current induced within conductors by a changing magnetic field.

Inductance

The property of a circuit that opposes changes in current; measured in Henrys.

Mutual Induction

The phenomenon where a change in current in one coil induces a voltage in a second, nearby coil.

Flux Density

The measure of the quantity of magnetic field lines per unit area.

Self Induction

The process by which a changing current in a coil induces a voltage in the same coil that opposes the change.