See also: Laplace

The force of Laplace is a force which is exerted on a discussion thread ($\backslash \; vec\; L$) in which passes a Electric current ( I ), in a Magnetic field ($\backslash \; vec\; B$). Its expression is:

One should not confuse the force of Laplace, macroscopic scale, with the Force of Lorentz in the absence of electrostatic Champ, scale microscopic, which is exerted on a particle charged Q moving at a speed ($\backslash \; vec\; v$) in a magnetic field:

Indeed the work of the magnetic part of the Force of Lorentz is always null whereas the work of the force of Laplace can be to him different from zero.

In fact the force of Laplace is the electrostatic part, on a macroscopic scale, of the Force of Lorentz. The force of Laplace results from balance electrostatic, macroscopic, of the loadings of the conducting conductor in reaction to the external magnetic field. Coarsely, the discussion thread preserves its form when it is subjected to the external magnetic field and when one applies the principle of action/reaction one obtains the force of Laplace.

See too

• Force of Lorentz
• Electromagnetism
• Pierre-Simon Laplace