As frequency increases, does series and parallel RC impedance decrease?

1 Answer
Jun 10, 2015

Yes,series and parallel RC impedance decreases with increase in frequency.

Explanation:

Series circuit:
impedance=resistance+i(reactance)
Z=R+iXc
Where,
R=resistance,
Xc=capacitive reactance

R=ρla
since resistance is related to type material,length of material,area of cross section of material,hence resistance is independent of frequency.

Xc=12fC

where,
f=frequency,
C=capacitance,
If we increase the frequency(f),Xc decreases.
If Xc decreases,then Z also decreases.