Question

What is the magnitude of the impedance of the following circuit?

(a) √(R+ωL)

(b) √(R-ωL)

(c) √(R^2+(ωL)^2)

(d) √(R^2-(ωL)^2)

This question was addressed to me in my homework.

The question is from Impedence Diagram topic in portion Complex Impedence of Network Theory

Answer 1

The correct option is (c) √(R^2+(ωL)^2)

For explanation: Complex impedance is the total opposition offered by the circuit elements to ac current and can be displayed on the complex plane. The magnitude of  the impedance of the circuit is √(R^2+(ωL)^2).