- #1
Kaguro
- 221
- 57
- Homework Statement
- In the given RC network, for an input signal of angular frequency w=1/RC, the voltage gain |Vo|/|Vi| and the phase angle between Vo and Vi, respectively are:
1/2 and 0
1/3 and 0
1/2 and pi/2
1/3 and pi/2
- Relevant Equations
- Xc = -j/(wC)
where j is the imaginary unit.
Kirchhof's Law:
Vi - IR - IXc - Vo = 0
But,1/wC=R
So, solving this, I find:
Z= 3R/2(1-j)
|Z| =##\frac{3R}{\sqrt 2}##
I =##\frac{V_i \sqrt 2} {3R}##
Vi - IR-IXc =Vo
Solving this,
##Vo = V_i -\frac {V_i \sqrt 2}{3} - \frac{V_i \sqrt 2}{3R} \frac{-j}{wC}##
##Vo = V_i(1 -\frac {\sqrt 2}{3} - \frac{+j \sqrt 2}{3})##
This is something that doesn't match the options.
I think I am doing something conceptually wrong( like parallel addition of resistance and reactance maybe..). Please guide me.
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