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A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets. A permanent magnet is an object made from a material that is magnetized and creates its own persistent ...
Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementary particles give rise to a magnetic field, magnetism is one of two aspects of electromagnetism. The most familiar effects occur in ferromagnetic materials, which are strongly attracted by magnetic ...
Other magnet programs are within comprehensive schools, as is the case with several "schools within a school". In large urban areas, several magnet schools with different specializations may be combined into a single "center," such as Skyline High School in Dallas.
Due to the movement of iron and nickel in our planet’s outer core, Earth is essentially a giant dynamo, continuously creating a magnetic field that forms the core of the magnetosphere —a ...
Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun.
A magnetic field (sometimes called B-field[1]) is a physical field that describes the magnetic influence on moving electric charges, electric currents, [2]: ch1 [3] and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. [2]: ch13 [4]: 278 A permanent magnet 's magnetic field pulls on ferromagnetic materials ...
In classical electromagnetism, magnetization is the vector field that expresses the density of permanent or induced magnetic dipole moments in a magnetic material. Accordingly, physicists and engineers usually define magnetization as the quantity of magnetic moment per unit volume. [1] It is represented by a pseudovector M. Magnetization can be compared to electric polarization, which is the ...
The potential magnetic energy of a magnet or magnetic moment in a magnetic field is defined as the mechanical work of the magnetic force on the re-alignment of the vector of the magnetic dipole moment and is equal to: The mechanical work takes the form of a torque : which will act to "realign" the magnetic dipole with the magnetic field. [1] In an electronic circuit the energy stored in an ...