Did you mean : Magnetic Field
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en.wikipedia.org/wiki/Magnetic_field

The magnetic field of larger magnets can be obtained by modeling them as a collection of a large number of small magnets called dipoles each having their own m. The magnetic field produced by the magnet then is the net magnetic field of these dipoles. And, any net force on the magnet is a result of adding up the forces on the individual dipoles.

www.britannica.com/science/magnetic-field

Magnetic field: Magnetic field, a vector field in the neighborhood of a magnet, electric current, or changing electric field, in which magnetic forces are observable. Magnetic fields such as that of Earth cause magnetic compass needles and other permanent magnets to line up in the direction of the field.

en.wikipedia.org/wiki/Earth's_magnetic_field

Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from the Earth's interior out into space, where it meets the solar wind, a stream of charged particles emanating from the Sun.

hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfie.html

Magnetic Field. Magnetic fields are produced by electric currents, which can be macroscopic currents in wires, or microscopic currents associated with electrons in atomic orbits.The magnetic field B is defined in terms of force on moving charge in the Lorentz force law.The interaction of magnetic field with charge leads to many practical applications.

www.wisegeek.com/what-is-a-magnetic-field.htm

A magnetic field is an invisible field that exerts a magnetic force on substances that are sensitive to magnetism.A classic example of one is the field created by an iron magnet; to see how the energy in such a field works, a small magnet can be placed under a piece of paper and iron filings sprinkled on it.

www.livescience.com/38059-magnetism.html

Magnetism is the phenomenon that arises from the force between objects that produce fields that attract or repel other objects.

www.khanacademy.org/.../magnetic-forces-and-magnetic-fields

Magnetic fields are extremely useful. The magnetic field of the Earth shields us from harmful radiation from the Sun, magnetic fields allow us to diagnose medical problems using an MRI, and magnetic fields are a key component in generating electrical power in most power plants.

www.physics4kids.com/files/elec_magneticfield.html

Magnetic Field Basics Magnetic fields are different from electric fields. Although both types of fields are interconnected, they do different things. The idea of magnetic field lines and magnetic fields was first examined by Michael Faraday and later by James Clerk Maxwell.Both of these English scientists made great discoveries in the field of electromagnetism.

www.khanacademy.org/.../a/what-are-magnetic-fields

A magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic. [Explain] When we speak of the force due to a magnet (or any force for that matter) it has to be on something.

www.dictionary.com/browse/magnetic-field

A magnetic field is said to exist in a region if a force can be exerted on a magnet. If a compass needle is deflected when it is put at a particular location, we say a magnetic field exists at that point, and the strength of the field is measured by the strength of the force of the compass needle.