Force exerted by magnetic field
Description
An electromagnet is a type of magnet in which the magnetic field is produced by electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet. The force exerted by an electromagnet on a section of core material is related to the magnetic field.
Related formulasVariables
F | Force exerted by magnetic field (N) |
B | The magnetic field (T) |
A | The area of the section of core material (m2) |
μ0 | magnetic constant |