Question

What is the impedance \[Z\] of the series RLC circuit?

Options

• \[Z=\sqrt{R^2+(X_C+X_L)^2}\]

• \[Z=\sqrt{R^2+(X_C-X_L)^2}\]

• \[Z=\sqrt{R^2+X_C^2+X_L^2}\]

• \[Z=R+X_C-X_L\]

Answer 1

Impedance is defined as \[Z=\sqrt{R^2+(X_C-X_L)^2}\]. It combines resistance with the difference between capacitive and inductive reactance.