What is polarity?

Asked by ambahanda | 23rd Nov, 2009, 01:33: PM

Expert Answer:

In physics, polarity is a description of an attribute, typically a binary attribute (one with two values), or a vector (a direction). For example:

  • An electric charge has a polarity of either positive or negative.
  • A voltage has a polarity, in that it could be positive or negative (with respect to some other voltage, such as the one at the other end of a battery or electric circuit).
  • A magnet has a polarity, in that one end is the "north" and the other is the "south".
  • The spin of an entity in quantum mechanics has a polarity - positive or negative.
  • Polarized light has waves which all line up in the same direction.

Answered by  | 23rd Nov, 2009, 01:53: PM

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