EXPERIMENT 8. Magnetic Field of a Solenoid. Produced by the Physics Staff at Collin College.
Magnetic Field of Toroid.
We can find the magnetic field due to a solenoid carrying a steady current as follows. First, we work out the field due to a single circular loop of radius as measured at a point on the axis (which we’ll take to be the axis) of the loop.
Figure 2: Magnetic field in a solenoid.
The magnetic field strength for a solenoid is given by B=μI*n/l. The inductance of a solenoid is close to L=μr²n²π/l, but diverges increasingly from this estimation as the length becomes shorter relative to the radius.
It's known that at the center of an electromagnet/solenoid the magnetic field $B$ is strongest there.
2. Position the solenoid and Magnetic Field Sensor so the end of the sensor can be placed inside the solenoid.
The magnetic field outside a solenoid looks very similar to that of earth: Solenoid Lab Write-up. Page 1. Figure 2.
Magnetic field varies from one shape to other like toroid has a different magnetic field than solenoid.
This article describes multiple methods of importing the magnetic field of a solenoid coil into SIMION.