Electric Field Invisible Magnetic Risk

Electric and Magnetic Fields: Invisible Risks? by Leonard A. Sagan,

Electric and Magnetic Fields: Invisible Risks?

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Electric field - In physics, an electric field or E-field is an effect produced by an electric charge (or a time-varying magnetic field) that exerts a force on charged objects in the field. The SI units of the electric field are newtons per coulomb or volts per meter (both are equivalent).

Magnetic field - In physics, a magnetic field is an entity produced by moving electric charges (electric currents) that exerts a force on other moving charges. (The quantum-mechanical spin of a particle produces magnetic fields and is acted on by them as though it were a current; this accounts for the fields produced by "permanent" ferromagnets.

Magnetic field density - Magnetic field density, otherwise known as magnetic flux density, is essentially what the layman knows as a magnetic field—akin to a gravitational or electric field. It is a response of a medium to the presence of a magnetic field.

Electromagnetic field - An electromagnetic field is composed of two related vector fields: the electric field and the magnetic field. When referred to as the electromagnetic field, the field is imagined to encompass all of space; typically an electromagnetic field is considered to be limited to a local area around an object in space.

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