A finite solenoid of radius R, length L, N turns and current I is considered at a point on its axis. Which quantities can affect the axial field?
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Question

A finite solenoid of radius R, length L, N turns and current I is considered at a point on its axis. Which quantities can affect the axial field?

G1 Physics · Accepted Answer

The finite-solenoid field depends on nI and on the end-angle geometry. Total N alone is insufficient because changing L changes n and the geometry.