# Magnetic field

Vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.

- Magnetic field101 related topics

## Eddy current

Eddy currents (also called Foucault's currents) are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction.

## Permeability (electromagnetism)

In electromagnetism, permeability is the measure of magnetization that a material obtains in response to an applied magnetic field.

## Field (physics)

Physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time.

Physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time.

However, it became much more natural to take the field approach and express these laws in terms of electric and magnetic fields; in 1849 Michael Faraday became the first to coin the term "field".

## James Clerk Maxwell

Scottish mathematician and scientist responsible for the classical theory of electromagnetic radiation, which was the first theory to describe electricity, magnetism and light as different manifestations of the same phenomenon.

Scottish mathematician and scientist responsible for the classical theory of electromagnetic radiation, which was the first theory to describe electricity, magnetism and light as different manifestations of the same phenomenon.

With the publication of "A Dynamical Theory of the Electromagnetic Field" in 1865, Maxwell demonstrated that electric and magnetic fields travel through space as waves moving at the speed of light.

## Curl (mathematics)

Vector operator that describes the infinitesimal circulation of a vector field in three-dimensional Euclidean space.

Vector operator that describes the infinitesimal circulation of a vector field in three-dimensional Euclidean space.

. This is why the magnetic field, characterized by zero divergence, can be expressed as the curl of a magnetic vector potential.

## Diamagnetism

Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force.

## Hall effect

[[File:Hall effect.png|thumb|Hall-effect:

[[File:Hall effect.png|thumb|Hall-effect:

The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor that is transverse to an electric current in the conductor and to an applied magnetic field perpendicular to the current.

## Momentum

Product of the mass and velocity of an object.

Product of the mass and velocity of an object.

and magnetic field

## Nikola Tesla

Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current (AC) electricity supply system.

Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current (AC) electricity supply system.

Tesla's work fell into relative obscurity following his death, until 1960, when the General Conference on Weights and Measures named the SI unit of magnetic flux density the tesla in his honor.

## Euclidean vector

Geometric object that has magnitude (or length) and direction.

Geometric object that has magnitude (or length) and direction.

Other physical vectors, such as the electric and magnetic field, are represented as a system of vectors at each point of a physical space; that is, a vector field.