AC Analysis: Parallel RLC Circuit. Calculate Voltage and Currents

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In this video, I determine the voltage across and currents through an AC circuit that has a resistor, inductor, and capacitor in parallel. To do this, I calculate the impedances of the components, identify the voltage across the components, calculate the currents through each component, and then calculate the total current. I also calculate the total equivalent impedance of the three parallel components.

This example comes from a free, online, open source textbook by Tony Kuphaldt. You can find the example here:

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Thank you for posting these videos. They're totally helping me out in my school work.

LALontoc

Holy! What a good video. I've been searching and trying to learn parallel impedance/admittance etc. for four hours. And you made it seem like simple arithmetic in a matter of minutes. Literally.

whiteowl

I'm glad I found this channel. I love the channel Engineering Mindset because his ability to break things down is incredible but there's zero math in his videos. You're doing great work sir.

MrLee-cypw

So we have 4 different currents flowing in this circuit. The mind blow for me is WHERE do these currents transition from one to another. For example, exactly where does I(T) at (-41.3 degrees) transition to I(R) at zero degrees? I have no problem with the calculations, but I can't visualize how/where these currents interact and morph in the wire. Any help would be greatly appreciated.

Festus

Wouldn’t ZL be at -90 degrees and ZC at 90 degrees, according to the ELI and ICE acronyms saying that the current of inductors lags the voltage and that the current of capacitors peaks before the voltage (on a phasor diagram)?

toinspireyou

Great video, but aren't we meant to convert capacitance to Farads?

greeneagle

The components dont have real or imaginary value only when the degrees are round like 90

Raulthegreek

Hey that was great, but just a smidge too fast. Not enough time to follow along.

urlkrueger

too fucking fast but thank you anyways

mrniceguy

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