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

1 Answer
Arunraju Naspuri
Jun 10, 2015

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

Explanation:

Series circuit:
impedance=resistance+#i#(reactance)
Z=R+#iX_c#
Where,
R=resistance,
#X_c#=capacitive reactance

#R=rho*l/a#
since resistance is related to type material,length of material,area of cross section of material,hence resistance is independent of frequency.

#X_c=1/(2prodfC)#

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

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