Solenoid (Electromagnet) Force Calculator

This calculator computes the force between a solenoid and another piece of ferromagnetic material separated by a gap of distance \( g \).

The formula used is:

\[ F = \frac{(N \cdot I)^2 \cdot \mu_0 \cdot A}{2 \cdot g^2} \]

where:

• \(\mu_0 = 4\pi \times 10^{-7}\)
• \(F\) 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