Hello,
I am currently going through RC circuits from https://en.wikipedia.org/wiki/RC_circuit
There are several conceptual things I am not able to appreciate ... I hope someone comments ...
Zc = 1/jCw = -j/Cw
I am sorry but I don't understand conceptually what it means when impedance is lying on the imaginary axis.
The other question I have is, conceptually what is meant by complex impedance?
Current through the RC circuit is,
I assume that the voltage falls exponentially with time. Is this correct?
Also, how would current change across the resister vary?
I assume that would also fall exponentially. Is this correct?
I am currently going through RC circuits from https://en.wikipedia.org/wiki/RC_circuit
There are several conceptual things I am not able to appreciate ... I hope someone comments ...
If I substitute Zc = 1/sC with s = jw thenThe complex impedance, ZC (in ohms) of a capacitor with capacitance C (in farads) is
The complex frequency s is, in general, a complex number,
where
represents the imaginary unit:
Sinusoidal steady state
is the exponential decay constant (in radians per second), and is the sinusoidal angular frequency (also in radians per second).
Sinusoidal steady state is a special case in which the input voltage consists of a pure sinusoid (with no exponential decay). As a result,
and the evaluation of s becomes
= 0
s = j
Zc = 1/jCw = -j/Cw
I am sorry but I don't understand conceptually what it means when impedance is lying on the imaginary axis.
The other question I have is, conceptually what is meant by complex impedance?
Current through the RC circuit is,
this is mentioned as a linear differential equation. How to check if a given differential equation is linear or not?Cdv/dt + V/R = 0
I assume that the voltage falls exponentially with time. Is this correct?
Also, how would current change across the resister vary?
I assume that would also fall exponentially. Is this correct?