Define the terms :(a) Inductive reactance(b) Capacitive reactance(c) Impedance

Answer:

(a) Inductive reactance (\(X_L\)): The effective opposition offered by a pure inductor to the flow of alternating current is called inductive reactance. \(X_L=\omega L=2\pi fL\). Its SI unit is the ohm; it increases with frequency.

(b) Capacitive reactance (\(X_C\)): The effective opposition offered by a pure capacitor to the flow of alternating current is called capacitive reactance. \(X_C=\dfrac{1}{\omega C}=\dfrac{1}{2\pi fC}\). Its SI unit is the ohm; it decreases as frequency increases.

(c) Impedance (\(Z\)): The total effective opposition offered by a circuit containing resistance, inductance and capacitance to the flow of alternating current is called impedance. For a series LCR circuit, \(Z=\sqrt{R^2+(X_L-X_C)^2}=\dfrac{e_0}{i_0}\). Its SI unit is the ohm.