• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.


Not open for further replies.


New Member
i ran across a formula and i would like to know what all of the variables are:

L = [(N^2) * μ * A] / l

im pretty sure l is length and A is area but i am confused about the rest.
any thoughts?


New Member
L = [(N^2) * μ * A] / l

that is what i saw from you..

there are 2 formulas for L (inductance), one is given n (number of turns per unit length), and one is given total N (total number of turns)

A is the cross sectional area of the coil

l is the length of the coil

hope that helps.


Active Member
AL ( I can't subscript the 'L') might also be a factor that is supplied by a core manufacturer to calculate the number of turns required for a value of inductance. I use the factor when desigining toroidal inductors.
Not open for further replies.

Latest threads

EE World Online Articles