main menu MyCT
Main
Forum
Ampere's force law

     Physical Sciences index
Electromagnetism index
Ampere's force law diagram
calc
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).
Current I1:
Current I2:
Separation:
Length:
Medium permeability:

Force:
Add login to add

notes
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.