Solenoid (Electromagnet) Force Calculator
This calculator computes the force between a solenoid and another piece of ferromagnetic material separated by a gap of distance g.
F = (Fm)2 μ0 A / (2 g2)
F = (N*I)2 μ0 A / (2 g2),
- μ0 = 4π10-7
- F is the force in Newtons
- N is the number of turns
- I is the current in Amps
- A is the area in length units squared
- g is the length of the gap between the solenoid and a piece of metal.
Note, any units can be used for A and g so long as they are consistent. For example, in2 and in, or m2 and m, respectively.