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View Full Version : Parallel RC Circuit Problem!!!!!!!!!!!!!


DethRose
Apr7-05, 09:50 PM
Hey ive been working on this circuit for hours and cant figure out 1 value.
This is exactly what was given to me on the page so i have no other information lol.

All that was written was:

find the values of Zt,It,I1,I2,Vc1

Ive found all the other values which are

Zt = 1.2 k angle -10.93
It = 8.28 mA angle 10.93
I1 = 8.13 mA angle 0
I2 = 1.57 mA angle 90
Vc1 i get 31.8 v angle -90 but the given answer is 5v and 0

An explanation y it is that value would be appreciated


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l l l
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l 550 ohm resistor .01 microFarad Capacitor
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10V angle 0 l l
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l 680 ohm resistor .01 microFarad Capacitor
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l frequency=5KHZ l l
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l----------------------l-------------------l

electro-man
Apr8-05, 06:58 AM
dumwit atleast type what you are asking properly

rayjohn01
Apr10-05, 01:30 PM
Well personally I would NOT call you dumbwit or any other name , but I am afraid he is correct in that I am not sure how anyone can understand your question
Ray

sousemouse
Apr19-05, 07:42 AM
so where's the micky mouse cartoon i was promised1

Xodar
Jun5-05, 10:47 AM
Hi DethRose,
The capacitors are equal in size and form a simple voltage divider across the source. Regardless of the current through the capacitors, the voltage across each capacitor must logically be half of the source voltage ... 5v @ 0degrees.

V_{C1}=V_s\frac{Z_{C1}}{Z_{C1}+Z_{C2}}
=V_s\frac{j\omega C1}{j\omega C1+j\omega C2}
=V_s\frac{C1}{C1+C2}=V_s\frac{C1}{2C1}=\frac{V_s}{ 2}

(it seems your other respondents have no imagination)