Long Solenoid
Safety Warnings
Warning: Electrical Safety with Energized Coils
Purpose
This large solenoid serves as a visual aid when discussing solenoid geometry and deriving \(B = \mu_0 n I\). Students can see the helical winding, the high length-to-diameter ratio that justifies the ideal solenoid approximation, and the hollow core through which magnetic field lines pass.
Figure 1:
The solenoid's high length-to-diameter ratio illustrates the geometry of an ideal solenoid.
Figure 2:
End view showing the hollow core and tight helical winding pattern.
Figure 3:
A ruler provides scale for estimating turn density $n$. Handwritten markings inside note the turn count and wire gauge.
Demo Apparatus
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