Dipole

dipole.

A dipole (one port) two arising poles with different in each case sign are spatially separate (+, -). This electrical charges or magnetic poles of same size can be.

A simple example of a dipole is a bar magnet.

Dipoles are characterized by their dipole moment. It depends onDistance and strength of the poles. A dipole is the source of a dipole field.

While the sources of other physical fields can quite be monopolies, with magnetic fields so far only dipoles were observed. Best example is here the magnetic dipole field of the earth, from north pole andSouth Pole exists, which are located close to geographical Poland.

An electrical dipole moment can be assigned to any electrical charge pattern apart from its total load, if it is not completely symmetrical, in second approximation. In addition one looks for the electrical emphasis for the positive charge and the electrical emphasisfor the negative charge. The two emphasis represents the dipole. The following, third term in this so-called multipole development is the quadrupole moment of the charge pattern.

Dipoles play macroscopically in addition, microscopically a role.

In chemistry a body becomes, with that the emphasis of the negative andthe positive charge do not collapse, when dipole marks. Water is a typical dipole.

see also

 

  > German to English > de.wikipedia.org (Machine translated into English)