May 03,2023
Coil impedance
Coil impedance refers to the total opposition to the flow of alternating current (AC) in a coil. It is a combination of both resistance and reactance, with the reactance being the dominant factor. The unit of coil impedance is ohms.
The reactance of a coil is determined by its inductance, which is a measure of the coil's ability to store energy in a magnetic field when a current flows through it. As the frequency of the AC increases, the reactance of the coil also increases, which in turn increases the coil's impedance.
The formula for calculating the impedance of a coil is:
Z = √(R^2 + XL^2)
● Z = impedance in ohms
● R = resistance in ohms
● XL = inductive reactance in ohms
In summary, coil impedance is the total opposition to the flow of AC in a coil, and is determined by both its resistance and inductive reactance.
