Hello there! I'm new to this forum and not quite sure if this question has been asked before. I've posted a link to the picture of the circuit I am trying to solve for. The circuit is rather simple but I cannot get it. =/ I need to find the voltage across the capacitor. I need to figure out the correct technique in order to do this because I have tried a few different ways and they do not give me the correct answer. I'm more concerned with how to do problems like these (multiple resistors, capacitors and inductors) because I seem to be doing something wrong and...I'm becoming more confused. This is what I've done:(adsbygoogle = window.adsbygoogle || []).push({});

I've tried Kirchoff's circuit laws and this is what I've come up with:

Vs = VR1 + VC1 and VC1 = VL + VR2 + VR3

I solved for the impedance in the inductor (ZL) and for the impedance in the capacitor (ZC). I get ZC = -j and ZL = j10.

I figured that I could use the voltage divider rule to solve for the voltage across the first resistor (VR1) which would then be:

VR1 = Vs*[ (ZR1) / (ZR1 + ZL + ZC + ZR2 + ZR3) ]

This gives me 16.3 - j2.44

Solving for the voltage across the capacitor I get VC1 = Vs - VR1.

This then gives me 83.7 + j2.44

This isn't the correct answer and I'm pretty sure not the correct way to approach this problem, lol. I don't think I've done the voltage divider rule correctly. In fact, I'm a little confused as to using the voltage divider rule. Can I still use it even though this circuit is made up of series and parallel components?

I have not tried doing a mesh current analysis just yet, but that to me seems to confuse me and take me in a circle just as much as the voltage analysis does.

Any help anyone can offer would be greatly appreciated! And many thanks in advance.

Circuit:

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Circuit Help

**Physics Forums | Science Articles, Homework Help, Discussion**