CalcTool: Ampere's force law calculator

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Ampere's force law

Force between two current-carrying wires.

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Currents flowing through wires create magnetic fields. This results in the attraction or repulsion of parallel wires according to Ampere's force law (given by F=μ*I1*I2*l/2π*r).

If the result is positive, then the force is attractive, and if the result is negative, then it is repulsive.
The permeability of most (nonferrous) materials is very close to the vacuum permeability (0.00000125664 H/m). The permeability of Nickel is ~0.000125 H/m and of steel is ~0.000875. Some special alloys have even higher permeabilities up to 0.01 and higher.