Question

How do I find the magnetic field in a multi layer solenoid?

Answer 1

From my understanding of Ampere's law, you should be able to use u o NI uoNI even though it's wrapped around multiple times, as N N will be turn density. Or else I guess you would need to brute force with Biot-Savart.

Answer 2

Explanation:

A multi-layered solenoid coil refers to a system many layers of magnetic wire wound on a suitable former. The basic structure of multilayered solenoid coil is shown in Figure 1. Where L is length, r1 is internal radius; r2 is the outer radius of the coil, while d is magnetic wire diameter.