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Polarity (physics)
In physics, polarity is an attribute with two possible values.
* An electric charge can have either positive or negative polarity.
* A voltage or potential difference between two points of an electric circuit has a polarity, describing which of the two points has the higher electric potential.
* A magnet has a polarity, in that it has two poles described as "north" and "south" pole.
* More generally, the polarity of an electric or magnetic field can be viewed as the sign of the vectors describing the field.
* The spin of an entity in quantum mechanics can have a polarity – parallel or anti-parallel to a given direction.
==See also==
* Polarization (disambiguation)
* Chemical polarity
fr:Polarité
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