Intro to AC Circuits using Phasors and RMS Voltage and Current | Doc Physics

We will use a cool method of describing the oscillation of current and voltage called phasors, which are fixed-length vectors that rotate at a constant frequency. It will be very fun. Yes, really.

[@DocSchuster]

India is awesome. Indians are some of my best students. I want to go there someday!

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Doc Schuster Ur have a great skills I love you...

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How about Egyptian?

[@kumarsanjeet7056]

great work..

[@blackcat-mp7kh]

Thanks doc

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Welcome

[@TheAmeliix]

"sqroot" hahahaha omg I love that! Thanks so much, I'm in first year engg and I need to pass this course.

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we all need to pass

[@krugerbrentquiming1903]

*screwed

[@davialbuquerque4964]

Do you study Engineering at the University of Victoria in British Columbia/Canada?

[@MarkMcDaniel]

When you don't have time for extra syllables.

[@alexxchavezee]

You just dispelled the mystery of RMS for me! Thank you!!

[@scholar7558]

After 9 years, this video is still so useful. Kudos to you professor.

[@danielespinoza264]

I just want you to know that I love you. Nah, but seriously dude your videos are saving me in class. I learned more from this video than I did an entire semester of circuits

[@DocSchuster]

Disha - work problems. Find a friend who is about as strong as you are in class. Work problems from the chapters that gave you the most trouble, and check them with your friend. And then work more problems. If a concept gives you trouble, watch a video, but then work more problems. Good luck.

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Doc Schuster 7:12 You: ahan?? me: O Yean!!

[@LithicStudios]

You're a good guy Doc. As an apprentice electrician trying to discern meaning out of a vague, cryptic textbook, I appreciate these videos immensely.

[@Dr_MW]

"Shoutout to India.." *grins* Shoutout to you too for this amazing vid. Hats Off!

[@andreasgutzold]

This is such an amazing video, your enthusiasm is so infectious. I could barely bring myself too study this topic for 5 minutes before this video and now I actually enjoy the topic, thank you.

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I usually never comment on KZbin, but just had to thank you for this! Absolutely brilliant

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do u have piles

[@ameyagadiwan]

Wish my teachers explained in this manner..i guess my whole class would have topped then..anyways..u kept me focused all the time with your strange but cool way..cheers!

[@jacquesd.k.812]

You're a legend. Thanks for making my electromechanics class bearable

[@Benlarsendk]

I am so facinated over how much you seem to enjoy teaching this. I never got why you'd take the half of v_max^2, but your way of showing it just made an AC-ligh bulb go on in my head! Keep on the EPIC work! :) Cheers!

[@DocSchuster]

Thanks, man! Did you ever wonder how much the power output from an AC incandescent bulb varies with time? The temperature must be quite stable, because power radiated goes like T^4.

[@Benlarsendk]

Doc Schuster No, but I kinda do now.

[@DocSchuster]

...excellent. [mysterious, slightly evil laughter]

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man im so glad i found you i have a electrical quiz in 2 days and exam in 8 days, I've learnt more here than i have in like 5 lectures... appreciate your work, defo subscribing

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Hassan Waris​ 😂 mine is on Thursday bro

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godwin enoch how come??

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+Nathaniel Weaver exam tmorow, beat that!!

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[@jfht318]

I have just started my electronics engineering at one of the worlds so called "top " universities, and I have struggled so much in keeping up with the course as they expect you to just know everything and do not explain things properly. I stumbled across this video and you explained this topic in such a beautiful way that I can finally appreciate what a phaser is and what the rms is. you could put a top professor to shame that is how good you're teaching is. Please continue your amazing work. Just goes to show that these universities are just great by name but when it comes to actually teaching their horrible waste of time and money. Most importantly thank-you for making learning fun and not a tedious regurgitation of knowledge where we do not know what anything does but we just memorise.

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which university is this

[@FlorianP98]

You are a great teacher. Thanks for making eveything easier and more visual than my educational system does :D

[@JonathanTolman]

Writes with crayola, teaches logically with the right bit of fun, you make learning fun again.

[@hydroslf]

i thought i heard "screwed", but then it was sqrt. phew. You're a savior! This helped me a lot! Thanks!

[@davidnelson2696]

I teach an electrical apprenticeship and have found your videos to be a great resource. You are a fantastic teacher! Thank you so much for your efforts here!

[@goku1863]

You make Physics so much interesting! Thank you Sir! Crystal clear concepts!

[@goku1863]

And Thanks for the indian shoutout :D

[@thatonegirlt]

This at 1.5 times is even more amazing. Thank you.

[@nicolearguelles4535]

You really make up for the lousiness of my AC electronics teacher. Thank you! Oh, and your pronunciation of square and square root is adorable.

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I have an oral exam tomorrow and your videos saved me, thanks!

[@jameslennard4062]

these videos are so helpful. seriously i didn't get this stuff after weeks of practise at A level, but now I'm revisiting it at University you've helped me learn this in 10 minutes

[@DocSchuster]

I agree with what you've said. My phasor for Vmax is pointing in some arbitrary direction, so it represents V at some arbitrary early time, as you've said! However, I call the phasor Vmax because that is its length AT ALL TIMES. If that makes sense, you are ready to rock phasors.

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This guy is sassy, I like him. You and Lasseviren1 have saved my grade

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I learned more about math from you in the first 11 mins then I think I ever have in my whole life. Everything is seeming to make sense now.

[@DocSchuster]

Yay! Math is love!

[@AnimsOnDemand]

I know this is an old video but I dislike all the comments about you being on drugs because you're "too enthusiastic". On the contrary, I loved it! This was super helpful and I'm at the start of my AC analysis class. Thank you for making this!

[@MahinMundra]

Haha you dropped the squur around 7:43. :P Great videos by the way. Thank you so much for making them.

[@lalnazochasev3082]

A shout out to india? I love you even more now! You're a really good professor! Also, sqrt.= scroot? Lol you the best!

[@rafay_syed]

Thanks so much! I have a physics exam coming up in three days and I was confused on AC circuits. This video clarified so much for me! I am subscribed :)

[@DocSchuster]

I'm glad to have you! Go get that exam.

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[@gotmoreO]

Your enthusiasm makes learning fun. I just started AC and it's giving me a bit of trouble, but alas! The Doc is here to help!

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Wonderful mate..my friends in india are loving your teaching..good job

[@DocSchuster]

You bet, and I'm glad they're helping. Electricity is one of my very favorite physics topics!

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I have my final exam tomorrow. Thankful is an understatement!

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Feels like i am watching saul goodman teaching physic while watching ur vid, great tutorial man saved my ass on the final!

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Great video! I would highly recommend including links in the description to your other videos continuing on from here, this way people can watch several of your videos on a topic with ease.

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Loved the yeep sound effects!A solid thumbs up!!

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best teacher ever. you make learning physics so freakin exciting lol

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If I were a good professor like you, I would be such happy guy!

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Ur a champ had a lecture the day and didn’t get it at all, but this really helped!

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Thanks Doc Schuster, I was looking a video to refresh me the AC principles , and this video was the best.

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Why can't all professors teach like this.

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C Rhee bcus they hate their jobs

[@davialbuquerque4964]

University of Victoria, British Columbia, Canada

[@Bernardus_McJamesicus]

best explanation i have found so far. Thank you so much!!

[@izukishun9757]

oh this is really helpful and hilarious. especially when you called every variables there as 'suckers'. thank you

[@egogoalie42]

"Scroot it..." I'm stealing that phrase, thank you

[@DocSchuster]

Please, share the love! Ain't nobody got time for that.

[@MetalHeadMarc]

It's changed how I'll talk about math not for the rest of my life.

[@tongjumy]

what an awesome way to teach circuits your voice is very fun to listen to as well

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Hey Doc schuster , you present these complicated things in such simple and innovative ways it just makes me wanna love things even more and more....

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Half way through your video and I can already say its amazing! Well done :)

[@DocSchuster]

Thanks, Ali!!

[@adntubecnn7673]

Sir, greetings from Romania, by far one of the best educational video about AC, RMS...sir you have indeed a lot of patience, unfortunatley my university proffesors are lacking this kind of skill and interest, they just read the power point....i wish you all the best and keep up the good work!!!!

[@BboyDaquack]

lol you say "screwt" and "sqwur" for square root and square haha anyway great video saving my life in physics.

[@fadsmfawopefaw]

no - he's saying sqrt and sqr like on a calculator :p

[@MetalHeadMarc]

I can't believe I haven't been using that way to say it for so long. It saves so much time, I was all screwted.

[@martinda7446]

Skroot....Gotta say this is brilliant. In the first few moments I thought, 'this is going to be rubbish', but wallop it grew quickly to max coolness.

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Ryan Reynolds probably took vocal lessons from this guy.

[@photon2724]

dude. You made this video 10 times better, cos now I'm thinking Ryan Reynolds is teaching me electrical engineering.

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You guys could make another world if this ends!!! LOL... Proud to be your student...

[@annasarahkramerfazendeiro8030]

Sounds like me explaining things to myself, only I couldn't explain AC circuits to myself because I didn't understand them. Thanks for this lovely video!

[@caseymathieson7023]

Vmax is the magnitude of V. Got it! Great video thanks for the help!

[@wtfchazpwnt]

This is a truly beautiful explanation. Thanks for taking the time to make this vid.

[@aeirya1686]

oh even tho i knew these stuff i watched this vid. I LOVE the way you teach. wish you lots of luck! :p

[@nipunparadkar9458]

Thank You!!! I am also Indian... Also I like the way you teach... It's just AWESOME!!! Love you brother... Keep up with your videos... It helps many of the students...

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Doc, You are a life saver..No Kidding!

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These are absolutely incredible. Awesome instruction. THANKS !!!

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Makes me like physics and you saved my semester! Thanks!

[@DocSchuster]

Woot. If you like physics, then we have that in common!

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slowly saving my degree as well :P

[@DocSchuster]

You've got so much time on your hands that you say Square Root? Consider yourself lucky. I'm a busy man.

[@elishaelisha7911]

LOL

[@sarthakrawat7748]

Why not just root Why add square

[@montypython3014]

Why not find avg of the absolute value of sin instead of sqr of it?

[@muhammadhussainsarhandi9928]

@@sarthakrawat7748 we say square root because you can also take cube root, 4th root . . . nth root, so we say square root in order to clarify that we are not taking any other root,

[@gordtvradio3465]

The way you say it is like nails on a chalk board though. Maybe it sounds cool to a girl in high school

[@pamellaviana4096]

omg, you have so much passion teaching, that is amazing! i wish all my teachers were like you!

[@jamilladambo]

Thanks for explaining the math concept behind the rms value. Most people just throw it out there with no reason as to what that means or why it’s important

[@elizabethvanek3164]

So much easier to understand than class lectures! Its a bit quirky, which makes it fun and enjoyable to watch! Sqr... lol

[@jelle31]

love the way you explain, just keeping it active and interesting!

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from today you are my teacher

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*OMG THIS GUY'S SO SMART AND RELATABLE TO ME!*

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squuurrrrrr

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skroooot

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lol You beat me to it by 3 years. =P

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strange!

[@NovaWarrior77]

Yo my knowledge of AC current went from 0 to 100. Preciate it good sir.

[@FunOrange42]

Thanks, my prof was using phasors all over the place and I didn't even know that they represent sine waves in the way that you showed.

[@yanivgardi9028]

Your videos are brilliant! You make everything sounds so simple...

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Hi there! I'm busy studying for my finals and your videos have really helped. Thank you!

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Man you're amazing! Seriously I feel like I owe you a beer

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Thanks, man! Where can I go to collect?

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People like you are always welcome to India..... :)

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bruh he is coooool, Thank you sir, greetings from the Philippines

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I might pass my final tomorrow because of you, thank you sooo much

[@floorlast6107]

Since Phasors is an entirely new concept i thought you would explain it with a fresher sort of clarity so as understand it much better....Although rest things are just good..including your background music ...video is appreciable ...Cheers...!

[@udasgupta601]

you made studying fun.... thank you... this video is really helpfull

[@MontanaPreston]

Excellent presentation! Thank you for spending your energy making this for us, it was very helpful! A+ in life

[@altuber99_athlete]

4:10 Wrong definition. Phasors _aren't_ vectors that are constantly rotating. They are static. The don't depend of the time (in fact that's why they are from the frequency domain and not from the time domain). The "thing" (factor) that makea them rotate is _e^jωt,_ but not the phasors themselves. Besides that, I think everything is correct. Great video!

[@DocSchuster]

Totes. Thanks for watching and tell your friends and your mom that physics is cool.

[@Hekrov]

what an awesome video/explanation!!! keep the good work

[@mattbackvass]

holy crap "sqrt it" - so awesome. i am stealing that.

[@DocSchuster]

No, YOU are awesome! Keep it up!

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That was fun! Thank you for this!! I'm gonna binge watch physics vids now LOL

[@squidpq]

Doc, I really enjoyed and appreciated this video (and all of your other videos for that matter). I have found your videos to be a good primer for the topics we cover in my class. Keep up the good work.

[@DocSchuster]

Thank you, sir!

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Best video so far! loved the energy :)

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nice energy while teaching.. Good work.

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Thank you for the video.. And much love from India.. 🙏

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Grown man that makes is own soundtrack. Got to love it 😂😂😂

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Wow... . . u rocks man. . . .. very very very very very very helpful. . . thnks. . . 😂😂

[@CoronaRay1]

Great job. Love your enthusiasm! I can tell that you really enjoyed making that video. :)

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U saved my days....it's really cool

[@rojer1182]

wow...This was really helpful...but I really wanted to know more about phasor diagrams and how to solve phase difference problems...

[@GuardianLancer]

Thanks Sir, from Egypt.