Dipole


In physics, there are several kinds of dipoles:

  • An electric dipole is a separation of positive and negative charges. The simplest example of this is a pair of electric charges of equal magnitude but opposite sign, separated by some (usually small) distance. A permanent electric dipole is called an electret.
  • magnetic dipole is a closed circulation of electric current. A simple example of this is a single loop of wire with some constant current flowing through it.[1][2]
  • flow dipole is a separation of a sink and a source. In a highly viscous medium, a two-beater kitchen mixer causes a dipole flow field.
  • An acoustic dipole is the oscillating version of it. A simple example is adipole speaker.
  • Any scalar or other field may have a dipole moment.

 

The Earth’s magnetic field, approximated as a magnetic dipole. However, the “N” and “S” (north and south) poles are labeled here geographically, which is the opposite of the convention for labeling the poles of a magnetic dipole moment

Dipole – Wikipedia, the free encyclopedia.

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