About Air Coil

Resistor-Inductor AC Behavior
Inductors and AC
Series RL Circuits
Steady State Response of a RL Circuit with Sinusoidal Input
AC circuits: alternating current electricity
RL Circuits - Introduction
AC circuit (交流電路)
REACTANCE AND IMPEDANCE -- INDUCTIVE
Inductance

Air coil calculation

Approximate Air Coil Inductance Calculator

http://my.athenet.net/~multiplx/cgi-bin/airind.main.cgi



Single-Layer Air Coil Calculator

http://www.pronine.ca/coilcal.htm



Resistor-Inductor AC Behavior

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/rlimp.html



Inductance of a Coil

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/indcur.html#c2



Impedance

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/imped.html#c1

Link of AC LR Circuit

http://mathinsite.bmth.ac.uk/pdf/lrseries_theory1.pdf
http://mathinsite.bmth.ac.uk/pdf/lrseries_theory2.pdf

http://mathinsite.bmth.ac.uk/pdf/lrseries_tut3.pdf