AC Theory: How to Show the Relationships Between Current and Voltage using Phasors in AC Circuits

[@thomaschatham9971]

Excellent video as always, when I was in electronic technician school in the U.S. Coast Guard we remembered the phase relationships with the following saying "ELI the ICE man" which reminds us that in an inductive circuit (ELI) voltage leads current and in a capacitive circuit (ICE) current leads voltage. I think your one of the very best teachers that I have seen on the internet. Keep it up!

[@JoeRobinsonTraining]

I like that memory aid, that's clever, thanks very much!

[@terencelai7]

Good One....I will remember CIVIL forever and ever.......

[@educationpower1823]

Very good. Informative and clearly presented. Thank you

[@GSHElectrical]

🕺

[@abdiahmed3091]

Thank you my dear

[@ndereratjijahura2048]

Thanks for excellent presentation Joe Robinson.

[@tedlahm5740]

Will take some time before this sinks in. Thank you.

[@JoeRobinsonTraining]

It'll start to make a little more sense with some of the upcoming videos Ted, stay tuned!

[@no_short_circuit]

Thanks Joe. Can't say I can see how it all fits together yet but I'm sure that'll come. At 2:09 for resistive loads you have a radius for the voltage and a "half radius" for the current along the same line. At 5:23 you have the current at 90 degrees south (for inductive) and at 7:43 you have the current at 90 degrees north (for capacitive). How are these positions established?

[@JoeRobinsonTraining]

The reason these values appear is because we can't use Ohm's Law to establish the current in circuits that have no resistance. We instead use Faraday's Laws of Electromagnetic Induction. It's a bit tricky to explain here and a wee bit beyond what we need to cover for electrical installation science but I'll do a video on it eventually. For the time being accept that current can lag or lead voltage and it will help you to understand the next part of the process.

[@a_l7515]

Useful video

[@Shiva68]

CIVIL Super explained

[@dexwhitmore]

Just come across this vid ask had Phasors land in my inbox for classwork, followed the city and guilds slides provided and I couldn't grip it at all. Figured I'd see if Joe had a video and thank god, I have a better understanding now. The '2 arms' method/graphic (the actual Phasor diagram? As opposed to 2 waveforms on a graph?) made it so easy to understand and yet I had none of that in the C&G slides, just waveforms.... Is there a particular programs used to generate the Phasors and animations as thst really helped my understanding. Thanks Joe!

[@JoeRobinsonTraining]

Oh wow, thanks for the kind comment Dex, and really glad the video helped you out, make sure you let your classmates know! Google: Desmos. That's the software I use.

[@karthiksc47]

Thanks!

[@JoeRobinsonTraining]

Oh wow, thank you so much for the super thanks, I really really appreciate it. 😊

[@lsnogaming2893]

On it 💕

[@ahmednor5806]

🙏🙏💐💐💐

[@KannanKannan-om9ln]

Civil super.