Circuit Analysis: Crash Course Physics #30

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  • Опубліковано 14 січ 2025

КОМЕНТАРІ • 606

  • @crashcourse
    @crashcourse  2 роки тому +9

    We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App!
    Download it here for Apple Devices: apple.co/3d4eyZo
    Download it here for Android Devices: bit.ly/3TW06aP

  • @freya3858
    @freya3858 8 років тому +1515

    has flashbacks to year nine physics where I blew up an ammeter by connecting it in parallel

    • @Deathlock-wz6qr
      @Deathlock-wz6qr 6 років тому +12

      aPiece OfPi lol😂😂😂😂😂😂

    • @angelstarfire
      @angelstarfire 6 років тому +3

      Lol

    • @olive7831
      @olive7831 5 років тому +47

      I once blew up a microwave by putting a pencil in it

    • @at9328
      @at9328 5 років тому +23

      @@olive7831 One my brother put a chick-fil-a sandwich bag (which is lined with tinfoil on the inside). Though he stopped the microwave in time, just seeing the microwave zap this bag like 5 times with blue electricity is pretty scary.

    • @taani
      @taani 5 років тому +4

      Noice, very noice

  • @patrickmayer9218
    @patrickmayer9218 Рік тому +97

    Just in case anyone like me was confused at 3:15, she did multiple steps in one go. She did (1/3) + (1/5), which is 0.5333, and then used algebra to set R equal to 1/0.5333, which is 1.88

  • @ruiningwang1644
    @ruiningwang1644 8 років тому +629

    I recently got pretty good at watching multiple series in parallel. : D

    • @Kacs_ky
      @Kacs_ky 8 років тому +101

      Joke level: dad

    • @ruiningwang1644
      @ruiningwang1644 8 років тому +10

      Haha thanks that's already pretty good in my book : P

    • @slpk
      @slpk 8 років тому +3

      nice

    • @fossilfighters101
      @fossilfighters101 7 років тому +3

      +

    • @jessfawthrop7537
      @jessfawthrop7537 7 років тому +1

      i noticed this too wasnt sure whether i was being stupid or not hahaha

  • @ssssssssssssssssssssssssss5503
    @ssssssssssssssssssssssssss5503 6 років тому +163

    I just wanted to let you know that this series carried me through this year of physics. My physics exam is in two days, I am truly grateful for what you have done. Thank you.

  • @kolbeowen3052
    @kolbeowen3052 4 роки тому +388

    She says”resistance” or “resistor” 88 times! I counted.

  • @viancagoosen3391
    @viancagoosen3391 6 років тому +16

    OH MY WORD GIRL THANK YOU SOOOOOOO MUCH!!!!!!!!!!!! After three years of physics in school I FINALLY understand electric currents!!!! Explained in a fun and easy way that could never before be broken down to me like this! I love it and sent it to my whole class! Thank you so so much!!!!!

  • @Kristine.baltazar
    @Kristine.baltazar 8 років тому +335

    This is one of my favorite physics videos that you guys made. It really helped me to understand this concept. Thank you!!!

    • @eirnyerinugha3984
      @eirnyerinugha3984 6 років тому

      Winson and Kristine i

    • @davidbedolla3941
      @davidbedolla3941 6 років тому +3

      holy moly I didn't know anything about circuits till now and I have a test tomorrow this video came in so clutch. Thank you.

  • @rideabike979
    @rideabike979 4 роки тому +94

    "You should appreciate what you have done."
    I havent done anything you did all the work for me.
    "You can learn so much more."
    Please no.
    "It wasnt that hard was it?"
    PLEASE STOP-

  • @Seth25r
    @Seth25r 8 років тому +15

    As a 1st year electronics student in college, this is a great re-cap of all the things I'd needed to pass the math parts of the test. Other comments point out a math error in an animation, but the way it's explained is spot on. After going through the course, this whole episode did a great job of putting all that information into about 10min. I'm impressed really at how well Shini is able to present it all. Thanks!
    P.S. I had an amazing teacher in highschool for my physics class, so I want the crash course team to know that my praise comes from someone who's had a high bar set for you all. Great job!

  • @andrewholmes1058
    @andrewholmes1058 6 років тому +12

    Your diagrams (and condensing them down as you go) has helped me A TON to work through these and understand them on a scale that "Whiteboard Math" doesn't always do. I would love it if you guys had dedicated practice problems where we could pause the video.... work through them, then continue on. Even one per little section would be great!

  • @Bitsmap
    @Bitsmap 8 років тому +49

    If I had this kind of help years ago when studying electronics maybe I wouldn't give up.

  • @k4rg0d00d13
    @k4rg0d00d13 8 років тому +8

    As a DIY guru who specializes in fun lighting setups using batteries or super capacitors, I found this video to be probably one of the most helpful videos in the whole crash course family!

  • @BlueyMcPhluey
    @BlueyMcPhluey 8 років тому +95

    best video so far, very clear concepts explained in a way that wasn't drowning in incomprehensible math

    • @Sparton646real
      @Sparton646real 7 років тому +3

      I prefer the Incomprehensible math to be honest....

  • @shinigami052
    @shinigami052 8 років тому +22

    Watching this gave me anxiety from circuits classes. College gave me PTSD. For sure I'm going to have the "OMG I missed a test or didn't do my hw" nightmare again tonight.

  • @JosephVFX
    @JosephVFX 8 років тому +257

    Sorry, small mistake at 3:14 - third line should be R_eq = 1.88Ω, not 1/R_eq.
    I feel like there should be some sort of pre-release that allows the public to catch mistakes before the videos are published.
    (Otherwise, these videos are beautifully made!!)

    • @danielbody6051
      @danielbody6051 8 років тому +3

      Yeah, I spotted that too.

    • @bluepalmsmusic
      @bluepalmsmusic 8 років тому

      Jay A W yes, please correct!

    • @Rezac66
      @Rezac66 8 років тому

      Please fix the miss in the equation.

    • @crashcourse
      @crashcourse  8 років тому +90

      Added an annotation. Thanks for the heads up, guys! :)
      - Nick J.

    • @FrancisBurns
      @FrancisBurns 7 років тому +7

      My professors would have failed you for that mistake....so much pain I've been through..

  • @takudhewa5779
    @takudhewa5779 7 років тому +3

    This helped me 10* more than my actual physics lessons like I know everyone says this but for the past 2 months I havnt understood circuits but after watching this video (with a few pauses) I know nearly completely understand the maths behind partaken and series circuits

  • @mugwerimollynasanga6666
    @mugwerimollynasanga6666 Рік тому +1

    number 1 i love her speed and accuracy, you go girl!

  • @WisdomOver50
    @WisdomOver50 6 років тому +3

    Such an amazingly beautiful and clear explanation of how to simplify a complex circuit. I cannot even BEGIN to tell you guys how thankful I am that you've helped me to understand this concept that I was struggling to grasp!

  • @laracroft003
    @laracroft003 8 років тому +110

    This was basically Stranger Things click bait for me.

    • @defrte
      @defrte 8 років тому +4

      Lara Croft For science ?
      I'll let that pass ;)

    • @tnttiger3079
      @tnttiger3079 8 років тому +1

      I didn't even watch the video
      I just watched the bits with animated characters from the show!

  • @jpsvs9983
    @jpsvs9983 8 років тому +12

    Im from Brazil and here we are about to have "our SAT" in four hours and I was still struggling to learn this.But let me say you guys are AWESOME cause you posted this video just in time,thanks.

  • @zacharywilson2657
    @zacharywilson2657 6 років тому +284

    Her: Saying a lot of stuff about resistors and Current sand voltage.
    Me: Struggling to understand.
    Her: See, it's really simple isn't it?
    🤦‍♂️🤦‍♂️🤦‍♂️

    • @xtzyshuadog
      @xtzyshuadog 5 років тому +10

      That's because a fourth of your lines aren't even in English,they're emojis

    • @MonaeJohnson
      @MonaeJohnson 5 років тому +7

      The example she used in that part was really simple. Very simple actually, it made me wonder why I thought this was so hard at the time I learned it. LOL

    • @sneakerhead6625
      @sneakerhead6625 5 років тому

      Zach Talks Back this is me

    • @sneakerhead6625
      @sneakerhead6625 5 років тому

      i understand it but it’s still a little bit confusing

    • @mikemcmo
      @mikemcmo 5 років тому +4

      She doesn't define the terms. And she edits out the space between sentences so youdon'thavetimetoabsorbwhatshejustsaid.

  • @ajc5154
    @ajc5154 8 років тому +10

    I LOVE HOW THEY CONNECTED THIS TO STRANGER THINGS ♡

  • @sjwimmel
    @sjwimmel 8 років тому +4

    Very cool that you managed to reference Stranger Things in the middle of the series!

  • @fazemiffy707
    @fazemiffy707 8 років тому +11

    STRANGER THINGS!!!! i just loved this channel even more.

  • @Diego-qt3xy
    @Diego-qt3xy 5 років тому +10

    4:09 Every time a teacher finishes explaining something

  • @adonaiblackwood
    @adonaiblackwood Рік тому

    lol at the quick lil stranger things reference 0:07

  • @kaleevans1692
    @kaleevans1692 7 місяців тому

    Amazing video and description. Thank you so much🎉

  • @binijoseph4917
    @binijoseph4917 6 років тому +7

    OMG!!!!!!! she is so amazing.... I have been learning from her for the past two years. Keep going, lots of love from India😘😘

  • @natrix4lifeproductions
    @natrix4lifeproductions Рік тому

    I just realized that the title card references Stranger Things LOL Love It

  • @helpontheway5404
    @helpontheway5404 4 роки тому +1

    Wow this is one of the best crash course videos for me. Just my opinion.
    Thanks:)

  • @flodachieftori
    @flodachieftori 4 роки тому +2

    so well explained! Thank you.

  • @JosiahWendell-sr8vi
    @JosiahWendell-sr8vi 4 місяці тому

    I keep coming back to this video when I get confused. This is like my 8th or 9th time XD
    Great resource, 6 out of 5 stars
    God Bless :)

  • @harrisonharris6988
    @harrisonharris6988 8 років тому +55

    your animation is wrong around 3:14, it says 1/Req = 1.88 when in fact Req=1.88.

    • @TheJaseku
      @TheJaseku 8 років тому

      That seems to happen a bit to often... there was a simular error in the last video too :(

    • @crashcourse
      @crashcourse  8 років тому +21

      On it. Thanks for the heads up!

    • @kauurimg4973
      @kauurimg4973 5 років тому +2

      How did they get 1.88 I dont get IT

    • @Dr_LK
      @Dr_LK 5 років тому +1

      @@crashcourse but no correction yet!

    • @trentburrell
      @trentburrell 5 років тому +4

      @@kauurimg4973
      1/x = 1/3 + 1/5
      1/x = 5/15 + 3/15
      1/x = 8/15
      8x = 15
      x = 15/8
      x = 1.875
      x = 1.88 (rounded up)

  • @chelseacco6
    @chelseacco6 7 років тому +2

    3:58 brought a single tear to my eye

  • @TheNydox
    @TheNydox 8 років тому +2

    Crash course you saved my life one again!

  • @scumbagel8518
    @scumbagel8518 8 років тому +61

    You know, thanks for making this series one year after I finished Physics class.
    Just my luck...

  • @kingk722
    @kingk722 7 років тому

    I dramatically enjoy watching your videos.

  • @uberEman
    @uberEman 8 років тому +5

    This is way more fun and helpful if you do the stuff with her.

  • @joshuastueck1899
    @joshuastueck1899 8 років тому +3

    This definitely helped my comprehension and moved at just the right pace. Good stuff!

  • @rishikenway522
    @rishikenway522 6 років тому

    Best explanation on resistors in series and parallel.

  • @kimberlylopez-zepeda4878
    @kimberlylopez-zepeda4878 7 років тому

    THANNNKKK YYOOUUUUU! Pictures help out sooo much! I hope this helps me with not only resistance but also capacitance.

  • @VideoPerfection
    @VideoPerfection 8 років тому +99

    Stranger Things in the thumbnail!!

  • @nicksgarage8295
    @nicksgarage8295 5 років тому +2

    1:18 i noticed a major defect in the train. If u look at the wheels, you have 2 smaller ones and 2 larger ones. There is a bar that spans the middle big one and the small one. The bar ensures the rpm of the 2 wheels are constant. The problem here is since the wheel diameters are different, these wheels are rotating at different linear ft/min and the train would stall and the wheels would burn out. So in reality this train would never work.....

  • @jayceel251
    @jayceel251 10 місяців тому

    THANK YOU SO MUCH UR A BLESSING

  • @bamhurger5376
    @bamhurger5376 8 років тому

    I needed this last year.

  • @mirandaglez670
    @mirandaglez670 Рік тому

    I love you. I was so confused and this helped a lot

  • @rijumondal6876
    @rijumondal6876 7 років тому

    shini thanks a lot man you saved my life !!!! in india they don't teach this rule for current and voltage split which made a huge misconception for 4 years you just cleared in 2 minutes!!!

  • @sharkdavid
    @sharkdavid 7 років тому +5

    One of the few CC Physics videos I only had to watch once! Of course, I am taking Physics II this semester. Thanks again Dr.!

  • @willkenyon7924
    @willkenyon7924 7 років тому +72

    Who saw "physics" being spelled out by the lights in the beginning?

  • @zackgravity7284
    @zackgravity7284 4 роки тому +2

    I think i'll need to come back to 6:30, that makes things easier
    So parallel resistors share the same voltage drop but split the current unevenly
    But series resistors split the voltage drops but share the current equally

  • @aanishkabhatt1727
    @aanishkabhatt1727 Рік тому +4

    Who understood the stranger things Reference in the start?

  • @Sharkz-iz6yf
    @Sharkz-iz6yf 6 років тому +31

    6:02 That’s what she said....

  • @Hofftari
    @Hofftari 8 років тому

    Wow, first CC physics that I managed to follow without any issues!

  • @chaz4510
    @chaz4510 8 років тому

    Great video! Never realised the stuff about the resistance in a voltmeter and an ampmeter

  • @cooldiys3477
    @cooldiys3477 5 років тому +1

    Wow thank you so much, this was so helpful!!

  • @gerardoixehuatl6776
    @gerardoixehuatl6776 8 років тому

    awesome!!!! i love physics now!!!!!

  • @k50159
    @k50159 7 років тому

    Amazing video. Thank you so much!

  • @gameisfun7851
    @gameisfun7851 7 років тому

    Thanks for such a great explanation.

  • @Mister_Soyuz_on_YT
    @Mister_Soyuz_on_YT 7 років тому

    I read the assigned reading and worked out the practice problem but had difficulty grasping the concept after lecture. This video showed me better with visual demonstrations.

  • @HaiderBukhari
    @HaiderBukhari 5 років тому

    she is the best study youtuber ever in history. And the youtuber with Best Acsent

  • @andreslozano3631
    @andreslozano3631 4 роки тому

    Thanks a lot. What a great video.

  • @chalicefuse881
    @chalicefuse881 7 років тому

    Thanks for existing, you are my hero, i have spent hours trying to understand this and you made it a mathematical biscuit.

  • @lejiang7255
    @lejiang7255 5 років тому

    This cleared up all my issues with basic circuit analysis. Thanks

  • @opufy
    @opufy Рік тому

    I just had a quiz on this and worked the solutions now watching this is super easy to absorb

  • @trippingreality4635
    @trippingreality4635 7 років тому

    Thanks, I really appreciate what you guys are doing.

  • @jonathangillooly9361
    @jonathangillooly9361 6 років тому +5

    I have learned more in this 10 minute video than my teacher has been able to explain over the course of three weeks

  • @boffin442
    @boffin442 7 років тому

    That's really good!

  • @adventurer247
    @adventurer247 8 років тому +5

    You guys need to do a detailed video on AC Power!

    • @Sophistry0001
      @Sophistry0001 8 років тому +4

      There's so many topics I want to see covered here. Different types of load besides resistors and how they affect the circuit. Inverters and rectifiers, AC, single phase and 3 phase, true power, reactive power, apparent power, impedance and so on.

    • @ChristionJohnson17
      @ChristionJohnson17 8 років тому +1

      That's engineering not physics.

    • @Sophistry0001
      @Sophistry0001 8 років тому +2

      Christion Johnson
      Engineering is just applied physics. Plus there is a lot of theory behind all electrical components and uses. The physics of electricity could almost use its own series.

  • @AyeshaKhan-gp9on
    @AyeshaKhan-gp9on 7 років тому

    I loved this video!! ❤❤❤

  • @adarshsarangi3542
    @adarshsarangi3542 4 роки тому

    Thank you mam!!. It became most easiest for me to understand.

  • @emans8762
    @emans8762 5 років тому +4

    I finally get circuits
    Thank you so much😀

  • @pixybubble
    @pixybubble 6 років тому

    honestly one of the best videos in this series, the entire breakdown was super helpful ^^

  • @FJBHowto
    @FJBHowto 7 років тому

    Thank you!!

  • @yungdagger336
    @yungdagger336 6 років тому

    i love you , you made my life easy

  • @nathanezra1
    @nathanezra1 7 років тому

    Finally...A Crash Course Physics video I completely understood.

  • @Vanillzz
    @Vanillzz 8 років тому +6

    I love this series so much!
    I'm in my my last years of high school studying physics, and this has helped me understand concepts so well! (even better than the teacher sometimes =_=)
    may this series never end! :D

  • @aquaticsplashes
    @aquaticsplashes 4 роки тому +2

    so where do we draw the line between physics and electrical engineering?

  • @yoon1270
    @yoon1270 6 років тому

    Thank you❤

  • @realmonsterlee
    @realmonsterlee 8 років тому

    love this channel, love her explanations , this video saved me from a week of experiments

  • @fatimaalbadi6175
    @fatimaalbadi6175 5 років тому

    I love it!

  • @qasdheem8289
    @qasdheem8289 4 роки тому

    Thanks a lot really helped

  • @jasonblack652
    @jasonblack652 7 років тому

    so helpful

  • @lavrentiysaharov2866
    @lavrentiysaharov2866 7 років тому

    Thank you so much

  • @mig004
    @mig004 6 років тому

    GOAT VIDEO

  • @8ky_Domz
    @8ky_Domz 5 років тому

    This is so helpful. Thank you! ^.^

  • @prenticedarlington2720
    @prenticedarlington2720 8 років тому

    Good. Very clear. Easy to forget and bust your multimeter on the current range. Been there!

  • @z_geist
    @z_geist 7 років тому

    Like this Gal. Awesome Video.

  • @Tom-gy5ii
    @Tom-gy5ii 6 років тому

    Great Video!!! Helped me study for a test! :D

  • @otmanelamhamdi7406
    @otmanelamhamdi7406 8 років тому

    thanks a lot !

  • @JohnathanGross
    @JohnathanGross 8 років тому +9

    At 3:14, you show 1/Req=1.88Ω when it should be Req=1.88Ω.

    • @crashcourse
      @crashcourse  8 років тому +9

      Fixed with an annotation. Thanks for the heads up! :)
      - Nick J.

    • @RICKDOEZ1
      @RICKDOEZ1 7 років тому

      Johnathan Gross how is it turning into 1.88 ohms. How is the 3 and 5 divide to end that way?

  • @ren7068
    @ren7068 7 років тому +1

    i have physics finals tomorrow and this saved my life thank you!!!

  • @Animefreak242
    @Animefreak242 8 років тому +1

    enlightening

  • @stephaniemedina8762
    @stephaniemedina8762 6 років тому

    Crash Course should really make a podcast

  • @bbpanzu213
    @bbpanzu213 6 років тому

    I love you now

  • @sarahnwosu1714
    @sarahnwosu1714 7 років тому

    Just wanted to say this video low key saved my life. Thank you ❤

  • @miasantangelo3003
    @miasantangelo3003 5 років тому

    YOU JUST SAVED MY LIFE THANK YOU!!!!

  • @chowinsnow
    @chowinsnow 4 роки тому +1

    I’m actually learning, and it’s glorious

  • @glaze8855
    @glaze8855 6 років тому

    this saved my life I have physic test tmr but the questions are more complicated but nahh it's ok maybe this help me with the easy question on the test

  • @citrus_aves
    @citrus_aves 6 років тому