# Long-solenoid field estimate
# Scope: Long air-core solenoid approximation; fringing omitted.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

turns = 500
current = 1 A
length = 100 mm
permeability = 0.0000012566370614 H/m

field := permeability*turns*current/length [T]

check field target: field >= 0.005 T

scenario alternative: turns = 400