Magnetism
Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. All materials are influenced to some extent by a magnetic field. The strongest effect is on ferromagnetic materials, which are strongly attracted by magnetic fields and can be magnetized to become permanent magnets, producing magnetic fields themselves.
History of Magnetism[edit | edit source]
The history of magnetism dates back to earlier than 600 BC. The Ancient Greeks were aware of this property, which they discovered in naturally occurring lodestone.
Types of Magnetism[edit | edit source]
There are several types of magnetism, including:
Magnetic Fields[edit | edit source]
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.
Magnetic Moments[edit | edit source]
The magnetic moment is a quantity that represents the magnetic strength and orientation of a magnet or other object that produces a magnetic field.
Applications of Magnetism[edit | edit source]
Magnetism has many applications in modern life. These include:
See Also[edit | edit source]
References[edit | edit source]
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Contributors: Prab R. Tumpati, MD
