A pair of opposite electric charges or magnetic poles of opposite sign separated by a small distance.
The uneven distribution of magnetic or electrical characteristics within a molecule or substance so that it behaves as though it possesses two equal but opposite poles or charges, a finite distance apart.
The uneven distribution of electrons within a molecule composed of atoms of different electronegativities may result in an apparent concentration of electrons toward one end of the molecule and a deficiency toward the other, so that it forms a dipole consisting of apparently separated but equal positive and negative charges. The product of one charge and the distance between them is the dipole moment. A bar magnet behaves as though its magnetism were concentrated in separate north and south magnetic poles because of the uneven distribution of its magnetic field.
1. A pair of equal and opposite electric charges or magnetic poles separated by a small distance.
2. An aerial half a wavelength long consisting of two rods connected to a transmission line at the center; SYN. dipole antenna.
Electricity, any object oppositely charged at its ends; a broadcast-receiving aerial consisting of a single metal rod.
In radio, a rod aerial, usually one half-wavelength or a whole wavelength long. + prikaži više