How does capacitance affect impedance?

1 Answer
May 30, 2015

Impedence (only in alternating current circuits) strictly depends on the resistance, inductive reactance (of inductive sources) and capacitative reactance (of capacitative sources).

Now, Capacitative reactance X""_C = 1/(omegaC)
Where omega is the angular frequency of the source and C is the capacitance.

Also, impedence, $Z = {\left({R}^{2} + {\left(X {\text{_C + X}}_{L}\right)}^{2}\right)}^{\frac{1}{2}}$

Where X""_L is the inductive reactance. and $R$ is the resistance.

Thus on increasing capacitance, the capacitative reactance decreases and thus the impedence also decreases.