Question

1. Let’s consider an AC circuit containing a coil. a) How does the impedance for this circuit change if the inductance is increased?

Answer 1

Impedance of an AC circuit is given by Z = $\sqrt{}$ (R² + (X_L - X_C)²)

= $\sqrt{}$ (R² + (wL - 1/wC)²)

Here we have considered only inductance L which means R = 0 and C = infinity

so Z = $\sqrt{}$ (wL)²

= wL

we can see that Z is a function of inductance and frequency , so impedance increases with inductance.

So as the induction increases impedance also increases