Question

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

Answer 1

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.