How does capacitance affect impedance?

1 Answer
Aritra G.
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 = (R^2 + (X""_C + X""_L)^2 )^(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.

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