Phasors for Inductors in AC Circuits | Doc Physics

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  • Опубликовано: 9 сен 2024
  • Phasors are a cute math technique to simplify AC circuit analysis. You'll like 'em.

Комментарии • 56

  • @117Oblivion117
    @117Oblivion117 7 лет назад +9

    You know, the whole AC thing just clicked in my head, and the best part is my exams are in less than 12 hours time.
    Seriously though, thank you so much for simplifying(and reinforcing) what I've learnt in class.
    Should have come across this channel sooner.

  • @nickydp1322
    @nickydp1322 8 лет назад +22

    I choked on my cookie when you said, "and the inductor will get pissed!" haha.

  • @radwas.khattab5754
    @radwas.khattab5754 8 лет назад +1

    You have no idea how much you helped me in my studies.
    I'd very like to watch LITERALLY all your videos, if only I had the time.
    Great!

  • @nassimback
    @nassimback 8 лет назад +24

    omg my dream teacher !

  • @DocSchuster
    @DocSchuster  11 лет назад +4

    That minus sign is Lenz's Law, and everybody should know it by this point. Obviously the voltage will be induced in a direction to oppose the change in flux, so I am interested only in the magnitude. Thanks for clarifying!

    • @zizo-ve8ib
      @zizo-ve8ib 3 года назад

      I have a question about that though, if we're solving problems that have to do with flux, does that mean we *don't* add that negative in our calculations ever ?

  • @trandrew96
    @trandrew96 8 лет назад +1

    I've been so confused for the past 3 weeks on this stuff, but this video clears everything. Thank you so much!

  • @DocSchuster
    @DocSchuster  11 лет назад +2

    Thanks! I think I'll do just that next year. Presently, I'm doing the problem-solving in my class with my students. I suggest you tie up a physics teacher and make him show you an example in your hometown. Then let him go and watch your back. We hold grudges.

  • @kabandajamir9844
    @kabandajamir9844 Год назад

    The world's best teacher thanks

  • @merveozdas1193
    @merveozdas1193 Год назад

    I am addicted to these videos

  • @triscuit5962
    @triscuit5962 4 года назад

    Thank you so much for your amazing work on these videos! This made me fall in love with ECE all over again and is helping me in the midst of garbage professors.

  • @faithsibelo5076
    @faithsibelo5076 9 лет назад +1

    Thanks Doc Schuster! You made me fall inlove with Phasors!

  • @amramjose
    @amramjose 2 года назад

    I love the use of low tech crayola on paper to teach, old school, like reading a real textbook...

  • @kiriInvestigator4597
    @kiriInvestigator4597 Год назад

    Best of the best! Thank you Sir for your generosity

  • @bigagigamigaliga
    @bigagigamigaliga 11 лет назад

    I LOVE THESE VIDEOS! never ever ever stop making them

  • @Ghostpalace
    @Ghostpalace 10 лет назад +1

    Thanks to you, my friend, I am going to pass this exam! :) Keep doing the examples with the Pi/2 phase shift.

  • @cdgt1
    @cdgt1 6 лет назад +2

    The current goes Shhhhhh! The voltage goes Kachtooo!

  • @yippppeexD
    @yippppeexD 9 лет назад +6

    i love this guy! xD

  • @omarhassan7715
    @omarhassan7715 9 лет назад +3

    I have a final lab exam tomorrow, You saved me Doctor :D

  • @creglist
    @creglist 11 лет назад

    Very helpful video. What would also be helpful would be if you put an example with numbers at the end to kind of show how to apply all the theory and proofing you do.

  • @smirkdoge9822
    @smirkdoge9822 8 лет назад

    electrical is my branch so as your channel is what i need to subscribe. thank you sir

  • @pajpacina3889
    @pajpacina3889 6 лет назад

    Thanks Doc Schuster, thumbs up!

  • @uceee1
    @uceee1 3 года назад

    WoW, this was the best

  • @sumantsingh4918
    @sumantsingh4918 4 года назад

    Lovely explain

  • @adenwhw
    @adenwhw 9 лет назад +1

    Hi Doc.Have you ever thought about the inductor produced the emf is exactly cancel out the applied voltage? The voltage finally applied on the inductor in the ac circuit is ZERO? I know emf is produced by changing current. But you just wrote EMF=applied voltage as well.

  • @NithinB-op8jo
    @NithinB-op8jo 7 лет назад

    man u r the best

  • @dantesmith3664
    @dantesmith3664 7 лет назад

    love this guy

  • @Nurturing.Nabyendu
    @Nurturing.Nabyendu 8 лет назад

    Man..... U R great 👌

  • @jeremybalzarini279
    @jeremybalzarini279 3 года назад

    Holy shit dude! Great video. Where did you go to school?

  • @abdurrehman4796
    @abdurrehman4796 8 лет назад +1

    Thank you sir. what's about numericals

  • @VarunRamanathan28031999
    @VarunRamanathan28031999 9 лет назад +1

    You are weird but you are great. Doc FTW

  • @kuangquan08
    @kuangquan08 11 лет назад +1

    I wanna know why V=L(Di/Dt), it suppose shoud be V=-L(Di/Dt), where si the negative sign?

  • @saikrishna-mh9hi
    @saikrishna-mh9hi 6 лет назад

    I found one difficulty in drawing graphs of sinusoidal main field flux due to source , lenz's flux that opposes changes in main flux , and also thus effective flux in inductor and thus the emf graphs, when a pure inductor is connected to an AC sinusoidal voltage source.
    Can you please upload them.

  • @JoeMoer
    @JoeMoer 11 лет назад

    Thank you :).

  • @fdist04
    @fdist04 7 лет назад

    You sound like Ryan Normandin, that MIT guy

  • @boombeachnoob3642
    @boombeachnoob3642 6 лет назад

    Video guide is good. But help me out on understanding how an inductor works with an AC voltage source using wave forms
    .................Things like : HOW WILL BE APPLIED SINUSOIDAL VOLTAGE GRAPH
    HOW WILL BE CURRENT THROUGH THE CIRCUIT
    HOW WILL THE FLUX BUILD UP AND INTURN PRODUCE ADITIONAL EMF AND THUS INDUCED CURRENT AND HENCE THE LENZ LAW FLUX...............................
    WAVEFORM OF HOW MAIN FLUX AND LENZ'S FLUX WILL AID AND OPPOSE EACH OTHER IN THIS PROCESS USING WAVEFORM ANALYSIS......................?
    PLEASE PLEASE PLEASE.......................THIS DOESN'T LET ME SLEEP AT NIGHTS.

  • @engineerencyclopedia6491
    @engineerencyclopedia6491 4 года назад

    Inductor will get pissed😜😂😂

  • @treytreydollaface1249
    @treytreydollaface1249 2 года назад

    21 of people who disliked this video you know are those who fail in class.

  • @haiderrehmanbutt720
    @haiderrehmanbutt720 9 лет назад +2

    At 8:20, cos(wt) should be changed to sin(wt - π/2).
    You are confusing co functions.

    • @DocSchuster
      @DocSchuster  9 лет назад +5

      Haider Rehman Butt Except for a minus sign, those are equivalent, right?

    • @jonathan-lw7hh
      @jonathan-lw7hh 9 лет назад +1

      +Haider Rehman Butt cos(wt) cannot be changed to sin(wt - π/2) because it is false

    • @smirkdoge9822
      @smirkdoge9822 8 лет назад +3

      +Haider Rehman Butt bro, a little knowledge is a dangerous thing

    • @prateekgurjar1651
      @prateekgurjar1651 7 лет назад

      you have a butt in your name

    • @sabhinai3737
      @sabhinai3737 5 лет назад

      @@DocSchuster even no minus sir It was perfectly alright

  • @BuzntFrog
    @BuzntFrog 8 лет назад +2

    *Draws symbol for ground* "if we add a battery"

    • @beyguy101
      @beyguy101 6 лет назад +2

      David Brandt thats a batteery. Earth has 3 lines

  • @recomoto
    @recomoto 6 лет назад

    İntegralle ve trigonometriyle bu kadar vakit harcatırken fizik derslerinde bu ispatları göstermemeleri çok saçma değil mi?

  • @danieltambunan5409
    @danieltambunan5409 6 лет назад

    I dont understand

  • @spencerhon4430
    @spencerhon4430 7 лет назад +1

    Sqwur

  • @rogerwood8285
    @rogerwood8285 5 лет назад

    Why don't you admit you don't really know

  • @akimijohni8398
    @akimijohni8398 3 года назад

    be more serious when you explain things ... we are not playing video games here ... !!