Nodal Analysis Example Problem #1: Two Voltage Sources

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  • เผยแพร่เมื่อ 23 พ.ย. 2024

ความคิดเห็น • 96

  • @Engineer4Free
    @Engineer4Free  3 ปีที่แล้ว +7

    Scroll up and hit that 👍 button if you found this video helpful!
    Full Circuit Analysis playlist is here: th-cam.com/play/PLOAuB8dR35ocf9Typ1iX9NRmX0V04UYfQ.html

  • @isaacmwangi7038
    @isaacmwangi7038 ปีที่แล้ว +77

    Thanks, though you have made a mistake at kcL B , because if you multiply -4(2-vB)
    You are supposed to get ( -8+4vB)
    So that you get =2vB-VA+vB-8+4vB
    If you solve further you get vA=7vB-8

    • @stacybatabe3843
      @stacybatabe3843 ปีที่แล้ว +9

      Thank God i wasn't mistaken

    • @siul2
      @siul2 11 หลายเดือนก่อน +3

      bro no wonder I was so confused

  • @bexleynessia7114
    @bexleynessia7114 2 ปีที่แล้ว +8

    I hate long video tutorial and yours is just so brief and simple easy to understand and fast to learn a big topic in less then 10 minutes thank you for this so helpful

  • @spoon4974
    @spoon4974 ปีที่แล้ว +3

    This one and the explanation made Nodal analysis so much more understandable

  • @md.abdullahalrafi6496
    @md.abdullahalrafi6496 2 ปีที่แล้ว +61

    100x better than my university teacher.

  • @Watatsuu
    @Watatsuu 2 หลายเดือนก่อน

    thankyou you are better than teach in my prof.

  • @ChiefYOUtuber
    @ChiefYOUtuber 3 ปีที่แล้ว +64

    7:02 For the second KCL you did an algebraic mistake. It is not +4 but -4

    • @engineering_awesome
      @engineering_awesome 3 ปีที่แล้ว +4

      Yes you are correct 😂

    • @Bech285
      @Bech285 2 ปีที่แล้ว +6

      True, although he didn't include it in his answer, as the correct amswer is Va=7Vb-8.

    • @charlottealfresco4517
      @charlottealfresco4517 ปีที่แล้ว

      Oops 😬

  • @rotimiamudeli
    @rotimiamudeli 8 หลายเดือนก่อน +2

    In NIGERIA, lecturers don't teach. They just give course outlines then ask you to go study yourself with brief explanations.

  • @noelleemma3043
    @noelleemma3043 2 ปีที่แล้ว +11

    -6 *-Va is +6va

  • @Sarathy_303
    @Sarathy_303 ปีที่แล้ว +4

    This guy made my day, and now i can teach my girlfriend!
    You get a subscription.

  • @MaxwellKampindu
    @MaxwellKampindu 6 หลายเดือนก่อน

    Life made simple thank you very much.. very simplified

  • @AlexTheTech
    @AlexTheTech 9 หลายเดือนก่อน +5

    5:05 Its supposed to be -18+6va, because negative times negative becomes a positive.

  • @santucigod
    @santucigod ปีที่แล้ว +3

    Totally amazing. I really could understand thanks to you.

  • @electriccircuits19
    @electriccircuits19 2 ปีที่แล้ว +3

    *“We learn more by looking for the answer to a question and not finding it than we do from learning the answer itself.”*

  • @cosmos8366
    @cosmos8366 2 ปีที่แล้ว +5

    I like how you used the fraction multiplied by 7 for less rounding issues

  • @cosmos8366
    @cosmos8366 2 ปีที่แล้ว +41

    In KCL - A you multiplied -6 by -va which you have as -6VA which should be +6VA . If it was -6VA you would not have 13VA but instead just have 1VA.. to get 13VA it has to be positive.

    • @bibitei8935
      @bibitei8935 2 ปีที่แล้ว +9

      Thanks i thought i was tripping

    • @cordelllitus2630
      @cordelllitus2630 2 ปีที่แล้ว +1

      distribute the negative first then it would be -3+VA

  • @KEERTHANACHIRRA-p1t
    @KEERTHANACHIRRA-p1t ปีที่แล้ว

    TQ for this sir..I am able to understand ur calsses easily

  • @officialfayomi
    @officialfayomi ปีที่แล้ว +3

    Am i the only one who noticed that he made a mistake in KCL B, while subtracting I5 from I4 and I3. He changed I5 sign from minus to plus.

  • @JacobAmoroso-s4k
    @JacobAmoroso-s4k หลายเดือนก่อน

    Why does my professor only use the circle voltage sources? The four-line ones look so much better when drawing. The art classes are in another building, man.

  • @wizardslab4326
    @wizardslab4326 2 หลายเดือนก่อน

    you made this easy for me thank you

  • @IceBelly
    @IceBelly 2 ปีที่แล้ว

    Thanks for this video , my guy saving my assignment rn

  • @ARR0W
    @ARR0W หลายเดือนก่อน +1

    KCL A is wrong, it isnt 13Va but 3Va. -6Va + 4Va + 3Va = -2Va + 3Va = Va

  • @antoni3071
    @antoni3071 ปีที่แล้ว

    You do amazing job! I am going through the playlist and smashing like on every video, cuz you deserve some positive feedback for this work

  • @mars8499
    @mars8499 ปีที่แล้ว

    Your voice is soothing

  • @jamaicagonzaga7887
    @jamaicagonzaga7887 2 ปีที่แล้ว +2

    Sir thank you so much, you saved my day....I already subscribed your channel....Thank you and God Bless

    • @Engineer4Free
      @Engineer4Free  2 ปีที่แล้ว +1

      You're welcome!! Thanks for watching =)

  • @shizaalmas
    @shizaalmas 3 ปีที่แล้ว

    Exellent .i visit a lot of channel bit your channel is best .you solve my confusion

  • @Himaperera14
    @Himaperera14 หลายเดือนก่อน

    Thank u so soo much . this helped alot❤❤

  • @umairawan658
    @umairawan658 8 หลายเดือนก่อน

    Much informative vid keep it up👍

  • @wesleytissmah6516
    @wesleytissmah6516 8 หลายเดือนก่อน

    Thanks understood clearly ❤

  • @merrysanjenbam603
    @merrysanjenbam603 3 ปีที่แล้ว +5

    Hi, I like your teaching but i have one doubt in this video. I want to know why i3 goes on right side? can't it go to left too? Please reply! much appreciated

    • @Engineer4Free
      @Engineer4Free  3 ปีที่แล้ว +7

      I just assumed a direction for i3, in this case it was to the right. When I drew it, it was an unknown, and I could have assumed either direction. If i3 ended up being a negative vale, then that would have told us that it was in fact pointing the other direction. However, in this example, we calculated i3 to be positive, so our assumed direction was correct.

    • @merrysanjenbam603
      @merrysanjenbam603 3 ปีที่แล้ว +1

      @@Engineer4Free Thanks a lot . Subscribed your channel. I hope your channel will help others a lot too Keep it up

    • @HardwareNinja
      @HardwareNinja 3 ปีที่แล้ว

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  • @nusratnoor8440
    @nusratnoor8440 ปีที่แล้ว

    May God bless you 🙏❤ bro

  • @ankitnigam4261
    @ankitnigam4261 3 ปีที่แล้ว +2

    at kcl b the final equation is wrong

  • @lagunacorona
    @lagunacorona ปีที่แล้ว +2

    Can you do one based on wheatstone bridge? also it seems from other comments on other videos that professors leave specific details out to "appreciate how to get the right answer" people don't have time to mess around.

  • @Pragmatic80
    @Pragmatic80 ปีที่แล้ว +1

    I'm boggled a little bit on 7:51
    How is 2VB + VB - 4VB = 7VB
    Shouldn't it be -VB?

    • @zackify187
      @zackify187 ปีที่แล้ว

      VB counts as 1. Same as how X counts as 1.

  • @amandragon8919
    @amandragon8919 10 หลายเดือนก่อน

    But how do you get KCL A -6 to -18 after simplify? may i know?

  • @atiqnajmi1163
    @atiqnajmi1163 6 หลายเดือนก่อน

    Nice video

  • @kennethkngoma1262
    @kennethkngoma1262 8 หลายเดือนก่อน

    Wow, Thank you so much

  • @kozuta8858
    @kozuta8858 ปีที่แล้ว

    what if the voltage source is flipped and negative sign is above?

  • @lagunacorona
    @lagunacorona ปีที่แล้ว

    I dont understand why i3 on one side is traveling in and is respresented as a positive ? and on the other set on node be as a negative ??? what is going on??

  • @layibashabir
    @layibashabir ปีที่แล้ว

    How to know the currents are out or in in direction please reply me soon

  • @tomitonaomy9666
    @tomitonaomy9666 ปีที่แล้ว

    Wow 🎉 thanks so much

  • @mohammadhoseinrivandi5657
    @mohammadhoseinrivandi5657 3 ปีที่แล้ว

    Hi,I have a problem and i can't solve it.Is there a way to send the problem so that you help me out?

  • @onyxtechnologyx
    @onyxtechnologyx ปีที่แล้ว

    I love u so much dude

  • @logithkumar5630
    @logithkumar5630 3 หลายเดือนก่อน

    Anyone clarify me if we consider I under 2 in opposite direction wether the equation Kcl A is messed or not

  • @micahjessy4736
    @micahjessy4736 2 ปีที่แล้ว

    Thanks for this video

  • @siddharthpg2919
    @siddharthpg2919 ปีที่แล้ว

    thank you so much !!

  • @nacht3894
    @nacht3894 ปีที่แล้ว

    Thank you sir

  • @amelia-ou9gn
    @amelia-ou9gn หลายเดือนก่อน

    THANKS

  • @tormentor2285
    @tormentor2285 2 ปีที่แล้ว

    love you man

  • @almiaangelol.9059
    @almiaangelol.9059 3 ปีที่แล้ว

    Hi how to solve if the 2 ohm's is unknown?
    Hope you notice

  • @FatimaZohra-hn3vi
    @FatimaZohra-hn3vi 3 ปีที่แล้ว

    What if we have only one voltage source

  • @faziltaftani8250
    @faziltaftani8250 11 หลายเดือนก่อน

    Which one of you guys student at university of lahor
    Our sir is wallhi azab😶

  • @EdwardTieku
    @EdwardTieku ปีที่แล้ว

    Erm how is -6x-3va still a -18va at kcl A

  • @nixnocar9004
    @nixnocar9004 ปีที่แล้ว +1

    i think that -6Vb is +6Vb

  • @kristoffermeyer8339
    @kristoffermeyer8339 ปีที่แล้ว

    The results are wrong i'm afraid. You made sign destribution mistake in the sign distribution in KCL A and B.

  • @Incomplete_artist
    @Incomplete_artist 3 ปีที่แล้ว +1

    How we find common dinominator?

    • @augustussinclair1626
      @augustussinclair1626 2 ปีที่แล้ว +3

      it's quite easy, actually! it's elementary level maths; basically you single out all the numbers on the bottoms of the fractions, line them up and start dividing with numbers in hopes of getting each number to a 1.
      for example, if you have 1, 2, 4 like in the Vb portion of the video - you ignore the 1 because it's already a one, so you have 2 and 4 left. both are divisible by 2, which - when divided - leaves you with a 1 and a 2.
      then you divide them again with a 2 and the end result is three ones, with two twos you used to divide them with.
      then you multiply the numbers you used while dividing (aka 2 and 2 here) with one another, and the end result is your common denominator (4 in this case).
      hope i was able to help!

  • @zackify187
    @zackify187 ปีที่แล้ว

    why is it not -va + 7vb = 8

  • @nixnocar9004
    @nixnocar9004 ปีที่แล้ว

    sorry the -6Va i mean is +6Va

  • @rpain-tt9dp
    @rpain-tt9dp ปีที่แล้ว

    you should use mesh hhere

  • @micheletjean-charles9966
    @micheletjean-charles9966 6 หลายเดือนก่อน

    VB should be 1.32v

  • @mightygod-bw3cn
    @mightygod-bw3cn 3 ปีที่แล้ว

    4:11 how to you know what to multiple with like when u did with 12

  • @AniMedicine737
    @AniMedicine737 ปีที่แล้ว

    Is it just me or he change the KCL at I⁵

  • @adriang.batarabsee3c363
    @adriang.batarabsee3c363 3 ปีที่แล้ว

    What happened to 7Vb?

  • @nixnocar9004
    @nixnocar9004 ปีที่แล้ว

    to come up 13Va

  • @seth2039
    @seth2039 2 ปีที่แล้ว

    huge

  • @joeaberman449
    @joeaberman449 ปีที่แล้ว +1

    minute 7:30 big mistake does not correspond to previous level throw you out of loop!!!!!!!!!!! review review

  • @mimiizabil4519
    @mimiizabil4519 3 ปีที่แล้ว +2

    ماتقدرش تهدر عربي

    • @mahadomar3089
      @mahadomar3089 3 ปีที่แล้ว

      ابحث عن عربي دي انجليزي.

  • @liamferguson4199
    @liamferguson4199 หลายเดือนก่อน

    All I’ve seen on this guys videos is that he makes mistakes in almost every single video. Can’t trust his teaching

  • @VRS876
    @VRS876 ปีที่แล้ว

    Don't put this type of videos

  • @mimiizabil4519
    @mimiizabil4519 3 ปีที่แล้ว

    Speak arabe

  • @pedrosmith7919
    @pedrosmith7919 หลายเดือนก่อน

    HOW DO YOU GET 7VB WHEN 1VB+2VB = 3VB (+)-4 YOU WOULD THINK THAT WOULD BE -1 NOT 7