Resistance, Reactance and Impedance

What is the difference between resistance,reactance and impedance for an ac circuit?

Ans..

1. Resistance -Ohmic resistance offered by a conductor connected in the ac circuit.It is due to the nature of material of the conductor.

Resistance is independent of the frequency of the source of current.

2. Reactance- Resistance offered by inductor or capacitor connected in the circuit.

It arises due to the fact that the alternating emf and current differ in phase by 90 degree, when ac passes through inductor or a capacitor.

 Reactance is dependent on the frequency of the source of current.

3. Impedance- Resistance offered by the LR  circuit or CR circuit or LCR circuit.

Impedance is dependent on the frequency of the source of current.