"A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials."
The energy associated with magnetic fields and the interactions between magnetic materials.
Magnetic fields: The area surrounding a magnet where its magnetic force is felt.
Permanent magnets: Magnets that have a persistent magnetic field, such as those made from iron or cobalt.
Electromagnets: Magnets that are created when an electric current flows through a coil of wire.
Magnetic poles: The two ends of a magnet where the magnetic field is strongest.
Magnetic flux: The amount of magnetic field that passes through a given area.
Magnetic induction: The process by which a magnetic field is created in a material when it is placed in another magnetic field.
Magnetic hysteresis: The tendency of a magnetic material to retain some of its magnetization even after the magnetizing field has been removed.
Magnetic levitation: The use of magnetic fields to suspend objects in mid-air.
Magnetic resonance imaging (MRI): A medical imaging technique that uses magnetic fields to create detailed images of the body's internal structures.
Magnetic dipole moment: A measure of the strength of a magnet's magnetic field.
Magnetic energy: The energy contained in a magnetic field, which can be converted into other forms of energy.
Magnetic monopoles: Hypothetical particles that would possess only one magnetic pole (north or south).
Magnetic permeability: A measure of how easily a material can be magnetized.
Magnetic domains: Microscopic regions within a magnetic material where the atomic magnetic moments are aligned in the same direction.
Magnetic storage: The use of magnetic fields to store information, such as on a hard drive or tape cassette.
Magnetic reconnection: A process that occurs when magnetic fields in plasma become tangled and are suddenly released, causing energy to be released.
Magnetosphere: The region around a planet where a magnetic field is present and affects the behavior of charged particles.
Magnetohydrodynamics: The study of the motion of electrically conducting fluids in a magnetic field.
"A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field."
"A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron and attracts or repels other magnets."
"A nonuniform magnetic field exerts minuscule forces on 'nonmagnetic' materials by three other magnetic effects: paramagnetism, diamagnetism, and antiferromagnetism."
"These forces are usually so small they can only be detected by laboratory equipment."
"The three magnetic effects on nonmagnetic materials are paramagnetism, diamagnetism, and antiferromagnetism."
"Magnetic fields surround magnetized materials, electric currents, and electric fields varying in time."
"It is described mathematically by a function assigning a vector to each point of space, called a vector field."
"In electromagnetics, the term 'magnetic field' is used for two distinct but closely related vector fields denoted by the symbols B and H."
"The unit of B, magnetic flux density, is the tesla."
"The unit of H, magnetic field strength, is ampere per meter (A/m)."
"In vacuum, the two fields are related through the vacuum permeability, B/μ0 = H."
"In a magnetized material, the quantities on each side of this equation differ by the magnetization field of the material."
"Magnetic fields are produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin."
"Magnetic fields and electric fields are both components of the electromagnetic force, one of the four fundamental forces of nature."
"Magnetic fields are used throughout modern technology, particularly in electrical engineering and electromechanics."
"Rotating magnetic fields are used in both electric motors and generators."
"The interaction of magnetic fields in electric devices such as transformers is conceptualized and investigated as magnetic circuits."
"Magnetic forces give information about the charge carriers in a material through the Hall effect."
"The Earth produces its own magnetic field, which shields the Earth's ozone layer from the solar wind and is important in navigation using a compass."