RL Circuit

Impedance Calculate

Examine Inductor Resistor

Contribution to complex impedance Phasor diagram

You know that the voltage in an inductive circuit leads the current because the Lenz' law behavior resists the buildup of the current, and it takes a finite time for an imposed voltage to force the buildup of current to its maximum.

RL Impedance

For

= x10^ H = mH = microHenries

at angular frequency		= x10^ rad/s,

frequency = x10^ Hz = kHz = MHz

and resistance R = x10^ ohms = kohms = Megohms,

the impedance is

Z = x10^ ohms = kohms = Megohms

at phase		= degrees.