Internal Resistance of a Battery, EMF, Cell Terminal Voltage, Physics Problems

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  • Опубліковано 13 гру 2024

КОМЕНТАРІ • 177

  • @TheOrganicChemistryTutor
    @TheOrganicChemistryTutor  11 місяців тому +6

    Final Exams and Video Playlists: www.video-tutor.net/

  • @sruplal
    @sruplal 2 роки тому +32

    For nearly 2 years, this concept has baffled me. Now I totally understand. Big up

  • @sapphireblue9209
    @sapphireblue9209 4 роки тому +29

    OH MY GOSH THANK YOU SO MUCH. NOW I FINALLY UNDERSTAND EVERYTHING THAT I MISSED IN CLASS. YOU EXPLAIN THINGS SO WELL TYSM FOR ALL YOUR VIDEOS AND PLEASE KEEP IT UP. THANKS.

  • @marissa954
    @marissa954 7 років тому +82

    OMFG U SAVED ME..ALTHOUGH UR VOICE ALWAYS MAKE ME SLEEP..U ARE A REALLY HELPFUL AND GOOD TEACHER..THANK YOU!

    • @TheOrganicChemistryTutor
      @TheOrganicChemistryTutor  7 років тому +47

      Thanks

    • @ericcartman1168
      @ericcartman1168 3 роки тому +3

      @krisda there's this feature on the phone where you can turn up the volume

    • @geeksharma6722
      @geeksharma6722 2 роки тому +1

      @@ericcartman1168 dude im on a MacBook Pro with headphones and all the volume options on max, I just have a ceiling fan on above me and I still barely can hear what he's saying.

  • @tiathathiah9861
    @tiathathiah9861 4 роки тому +714

    My exam is in like 30 mins 💀💀

  • @LifeUnfolded1
    @LifeUnfolded1 7 років тому +47

    Eventhough I dont take any physic class , but I'm gonna save these video so I can learn it myself this summer time

  • @vibacourtney-battista6918
    @vibacourtney-battista6918 5 років тому +11

    excellent video on this topic, this was the only part of AS physics i was wobbly on before tomorrows exam

  • @Og_Moose_
    @Og_Moose_ 4 роки тому +119

    Who else is here in 2020 cause they skipped all their online classes?😂😭

    • @Alex-wn8qh
      @Alex-wn8qh 4 роки тому +5

      I was sick for like 3 days and missed so much this man saved me

    • @sanjitsaravanan5303
      @sanjitsaravanan5303 4 роки тому

      lmao me

    • @lotus_flower2000
      @lotus_flower2000 3 роки тому +1

      I ended up falling.. turns out the pass rate of the course was 34% so at least im not alone...

    • @amitagarwalla8205
      @amitagarwalla8205 3 роки тому

      shut up you burglAR

    • @lks9988
      @lks9988 3 роки тому

      2021 and yes

  • @Arkalaky2
    @Arkalaky2 7 років тому +71

    You are killin it with this videos. Do you have plans to start magnetic fields anytime soon?

  • @sahitiputcha
    @sahitiputcha 6 років тому +7

    Thank you so much. It's really helpful. You are a very good teacher...

  • @stevec9669
    @stevec9669 2 роки тому

    Best explanation on this subject on UA-cam. Thanks much.

  • @emacelikovic1675
    @emacelikovic1675 10 місяців тому +1

    i loooveeee physics yayyy i loveee staying up to study because im too anxious to sleep

  • @nunu-d5s
    @nunu-d5s 4 роки тому +6

    This can be helpful but its more like an ASMR to me perfect vid to sleep in

  • @ryanirwin652
    @ryanirwin652 6 років тому +8

    V. clear explanation and logical working. Thank you

  • @hovalgames7819
    @hovalgames7819 11 місяців тому +2

    My final first year exam in about three hours...
    Wish me luck

  • @nixs6061
    @nixs6061 2 роки тому +1

    This video cleared up a lot of things, thank you so much

  • @agyirnana
    @agyirnana 10 місяців тому

    I really enjoy your subject only when you add more questions to it

  • @SquatSimp
    @SquatSimp 4 роки тому +5

    This helped a ton- thanks man

  • @nancylei7273
    @nancylei7273 4 роки тому +3

    Such good video. Although it is not very logic, it is great for me to review.

  • @ayshathulthasleema8668
    @ayshathulthasleema8668 2 роки тому

    Ur amazing sir, all your videos r very helpfull

  • @matomekgorane8880
    @matomekgorane8880 5 років тому +14

    Excellent explanation ...I really enjoyed your lesson 🤩🤩 am just looking forward for more lessons ☺️☺️

    • @ahmetcan-wp2ou
      @ahmetcan-wp2ou 2 роки тому

      I can't speak english but, These lessons are so good.

  • @dilaraflor4191
    @dilaraflor4191 3 роки тому +2

    At 3:10 you used the total resistance to solve for the current but at 8:42 you solved for the current by only using the R of the load resistor should it not be the total (r + R) when solving for the current ?

  • @rakshagopinath8984
    @rakshagopinath8984 5 років тому +4

    thnx a gazillion times !!!

  • @ibrahimaaly4206
    @ibrahimaaly4206 Рік тому +1

    my physics exam tmr :p

  • @celwinpaulapas1518
    @celwinpaulapas1518 3 роки тому

    Waw clean explaination. Thanks

  • @oyeludejomiloju704
    @oyeludejomiloju704 3 роки тому +2

    Thank you 🥺

  • @joelcharles2063
    @joelcharles2063 3 роки тому +1

    I really appreciate this🙏

  • @Robsam28
    @Robsam28 5 років тому

    Very good explanation .

  • @kerry2341
    @kerry2341 Місяць тому

    Nah physics is actually interesting when u understand it🎉

  • @berhanuedea2590
    @berhanuedea2590 3 роки тому

    Thank you so much! it helped me a lot

  • @francisseun
    @francisseun 3 роки тому

    Thank you God bless you

  • @Iamsushant-n4c
    @Iamsushant-n4c 5 місяців тому

    I am watching this video in my exam 😊 .

  • @ranganathd5954
    @ranganathd5954 6 років тому +1

    you are a very good teacher thanks a lot sir

  • @paulna5526
    @paulna5526 Рік тому

    finally somebody that knows what they're talking about, excellent job, i can't believe the other ah's on youtube that are providing so much misinfo., it is ridiculous.

  • @kalindakamwale3929
    @kalindakamwale3929 9 місяців тому

    The book is by Tom Duncan. Reprinted 2013.

  • @ram_pande8039
    @ram_pande8039 6 років тому +1

    Explained well

  • @sakariasakaria6364
    @sakariasakaria6364 3 роки тому +1

    you great keep it up!

  • @sn4rdnsn
    @sn4rdnsn 7 років тому +2

    yea a magnetic fields video would be great

  • @zarrinrazaq3339
    @zarrinrazaq3339 5 років тому +1

    Usefull demo. What software are you using here?

  • @peteralkhabout8920
    @peteralkhabout8920 4 роки тому +3

    how we can calculate it from the graph though ?

  • @lilytang5799
    @lilytang5799 6 років тому +1

    It is very helpful!

  • @dhyangundu9635
    @dhyangundu9635 6 місяців тому

    I like how that guy uses a calc for multiplying 0.11988 and 100

  • @shadowkokufu9178
    @shadowkokufu9178 4 роки тому +4

    Hi, will you do a video on a VI graph and calculating the internal resistance + current + emf by using the graph please?

  • @hypotheticalexperiments4336
    @hypotheticalexperiments4336 2 місяці тому +2

    I have exams in 39 minutes 😢

  • @Xxxcappie23
    @Xxxcappie23 2 роки тому

    Great vid .At the time 3:35 Why do we not multiply by 101 ohms being the total resistance?? Instead you multiplied by the 100 ohms resistor . I may have complicated this by asking plz explain...

    • @aleena158
      @aleena158 2 роки тому

      If I understand your question right, the R=1ohm
      R=100 ohm
      Is more like part (i) part (ii)
      The question can be taken as find internal resistance when external resistance is (a) 1ohm (b) 100 ohm

  • @masarratfatimarizvi1240
    @masarratfatimarizvi1240 5 років тому

    Gud explanation

  • @Kryto
    @Kryto 7 років тому +3

    Can you do the same, but a little more practical? In this situation you wanted to calculate and measure internal resistance, and you had the Emf value. But in a real situation you cant relay on the value you get from the producers. Since most batteries wear out with use (at the same time internal resistance increases)
    In other words. Calculate Internal resistance with Emf as an unknown value.

  • @anupamapatham1141
    @anupamapatham1141 4 роки тому

    Thanks a bunch🤩

  • @elijahkamchize5441
    @elijahkamchize5441 2 роки тому

    Final touches 😊 exams at 2

  • @epicbaconugget704
    @epicbaconugget704 6 років тому

    you can also calculate internal resistance without finding current just by doing (1 - 11.9/12) x 50

    • @Todaywalnut
      @Todaywalnut 6 років тому

      What's the principle you're using?

    • @colamentos4738
      @colamentos4738 5 років тому

      EP1C (ocn) where did you find that? :\

  • @ashdora7300
    @ashdora7300 5 місяців тому +2

    Exams in 30 min😭

  • @satarupadebsinha3413
    @satarupadebsinha3413 7 років тому

    Nicely explained

  • @rookiemvp2008
    @rookiemvp2008 3 роки тому

    My brain is exploding trying to understand this stuff

  • @riyajadhav1911
    @riyajadhav1911 7 років тому

    thank uuu soo mucchh👍👍

  • @amazonabera2918
    @amazonabera2918 7 років тому +1

    sir i love ur videos they helped me alot .sir if u have avideo which shows potential difference between two points in the circuit

  • @Cuppy-e4r
    @Cuppy-e4r Місяць тому

    God Bless you

  • @bloodevolver2533
    @bloodevolver2533 4 місяці тому +1

    Aren't they in parallel? You said series?

    • @oniyous2619
      @oniyous2619 2 місяці тому

      its series bro

    • @bloodevolver2533
      @bloodevolver2533 2 місяці тому

      @@oniyous2619 yeah I saw that after I commented bro 🧍

  • @kalindakamwale3929
    @kalindakamwale3929 9 місяців тому

    I have a question it actually comes from the text book titled "success in electronics" 2nd edition In Unit 2 Direct Current subtitle 2.14 problems. No 14 the last problem. It has fig 2.20, and the question says in fig 2.20, V is a high resistance voltmeter.
    a) it reads 6V when the switch is open and 4.8V when it is closed. Calculate the e.m.f and internal resistance of the battery battery. Please help.

  • @drpriya23
    @drpriya23 4 роки тому +1

    Why during charging V= e.m.f + Ir??

  • @brayton6683
    @brayton6683 4 роки тому +1

    I'm writing a test tomorrow ☠☠☠🤧 it's on circuits and electrostatic

  • @ijeomachioma8547
    @ijeomachioma8547 18 днів тому +2

    Abeg hu come from 2024😅

  • @lineekelaleonard4808
    @lineekelaleonard4808 Рік тому

    2. Terminal pd across the battery is measured at 6.2 V. The battery consists of 2 cells
    connected in parallel. Given that R_total is 3.1Ω and A measures 2 A:
    2.1 Determine the emf of the battery.
    How can I solve this JG?🤔

  • @frogj0
    @frogj0 Рік тому

    how to find emf when no current flows?

  • @hammadsaeed877
    @hammadsaeed877 3 роки тому

    On which app you teach us tell me plz?

  • @wilburanderson4565
    @wilburanderson4565 8 місяців тому

    Thanks boss

  • @hibyelol4727
    @hibyelol4727 2 роки тому

    Is total resistance same as effective resistance?

  • @JekoAlpalls
    @JekoAlpalls 2 місяці тому

    I have an assignment i should submit in less than 3 hours from now, And i have 100 problems to solve untill then

  • @carlytran711
    @carlytran711 3 роки тому

    wow thank you

  • @IvanPavlov007
    @IvanPavlov007 3 роки тому

    Thanks! And what if it's an old battery? What happens to the e.m.f. and the internal resistance as the battery ages and loses its charge?

    • @ziadsydek
      @ziadsydek 2 роки тому +1

      First the e.m.f is what is written on battery's by company's and nothing happens to it but
      The terminal potential is the actual value of the battery and as time gose it decrease bec of internal resistance of the battery and this is called lost potential
      Then emf= t.p + l.p

  • @onyeagoluhenry60
    @onyeagoluhenry60 Рік тому +1

    A circuit consists of a variable resistor R connected in series with an ammeter and a cell. A voltmeter is connected in parallel across the variable resistor R. the cell is of e.m.f E and internal resistance r. For a certain value of R, the voltmeter reads 4V and the ammeter reads 1A. When R is adjusted, the voltmeter reads 2V and the ammeter reads 2.5A. Draw the circuit diagram and calculate the values of E and r. Please help!!

  • @geirha75
    @geirha75 Рік тому

    Does it really work in "real life"? I mean calculating internal battery resistance 12V car battery the way done in the video?

  • @adrianmok8557
    @adrianmok8557 3 роки тому

    I have a question: if I were to find the internal resistance of a battery, should I use a resistor with higher resistance or one with a lower resistance? Thank you.

  • @angeldust_4518
    @angeldust_4518 3 роки тому

    or for last r=e-v/I same thing just easier for me to solve straight away if remember this

  • @jillaloo5152
    @jillaloo5152 6 років тому

    How to find internal resistance given voltage, current and resistance? Electromotive force is not given

  • @andrewnicholas2221
    @andrewnicholas2221 10 місяців тому

    my exam is in 12 hours and im 12 weeks behind 💀

  • @NMPVevoOfficial
    @NMPVevoOfficial 3 роки тому

    What do we do if they didnt give us the internal resistence? Thanks tho

  • @idk-dr7fo
    @idk-dr7fo 2 роки тому

    tysm i got it 4jan2022 7:28 pm

  • @karanaage3946
    @karanaage3946 3 роки тому

    🙏 thanks

  • @katushadeeva6909
    @katushadeeva6909 7 місяців тому

    life saver

  • @omkardixit7320
    @omkardixit7320 4 роки тому +1

    Anyone studying this in 10th grade?

  • @SkystormX05
    @SkystormX05 2 роки тому

    tysm

  • @diana0423
    @diana0423 3 роки тому

    Thanks a lot!!!!!

  • @sultansultan5447
    @sultansultan5447 3 роки тому

    For your last equation you divided by -12 and your overall result was .42 however to my understanding another way I tried which goes by the rules of transposition if you have 11.9=12-0.238r if you move the r to the other side of the = side and the same with the 11.9 makes it -r=12-0.238-11.9 then change all the signs of positive to negative to both sides making it r=-12+0.238+11.9 and get result of 0.138. either I'm wrong or you are. If there is anyone here who understands this better then me please explain. Thanks

    • @blacklyrics049
      @blacklyrics049 2 роки тому

      dayum, 11.9 = 12 - 0.238r ; here 'r' is multiplied to -0.238, so you can't just simply take only the 'r' to the other side of the equation, you gotta take the whole -0.238r to the left, if you want to, and the equation will be
      11.9 + 0.238r = 12, then you can carry out this...

  • @buddhabhushanchakre1767
    @buddhabhushanchakre1767 5 років тому

    Two resistor 12 ohm and 6 ohm are connected in parallel and this combination connected in series with 6.25 ohm and battery has internal resistance of 0.25 ohm how to find emf of battery???

    • @itstheannas
      @itstheannas 5 років тому

      Do you not have the current given? Or the total power dissipated? If so, is it an expression you have to fond or a value?

  • @chateaubunny
    @chateaubunny 4 роки тому

    Are u ever going to do a face reveal

  • @noorabbass6936
    @noorabbass6936 5 років тому +5

    ادعم الفديو ترجم الى العربي ارجوك

    • @UltraTheBeastt
      @UltraTheBeastt 3 роки тому

      what are you saying ???

    • @gshsenpai6446
      @gshsenpai6446 2 роки тому

      He is proposing to include Arabic captions for the video

  • @imaneggagrass5573
    @imaneggagrass5573 3 роки тому

    how do i calculate terminal voltage when internal resistance (r) is unknown? :"(

    • @sultansultan5447
      @sultansultan5447 3 роки тому

      Get your voltage difference between your load. With that voltage find the current using ohm's law assuming you know the resistance of the circuit. After you have the current of the circuit and the voltage difference use equation: vr( the voltage difference you measured) = ( the internal resistance of the battery which you don't know)- Current multiplied by the resistance.
      You simply get vr to the other side of the = sign to become a -vr and the internal resistance to the other side so the equation would be your internal resistance= - vr - ir. Vr is voltage difference and ir is current multiply by resistance that would give internal voltage.

  • @icemoodmage
    @icemoodmage 7 років тому

    Hands down.

  • @zeusong149
    @zeusong149 7 місяців тому

    isn't that parallel?

  • @manishdevadiga7828
    @manishdevadiga7828 3 роки тому

    🙏🏼

  • @glizzytothetop
    @glizzytothetop Рік тому

    exams in an hour

  • @faithonderi263
    @faithonderi263 Рік тому

    Use the question I gave you plz

  • @zohabettul7703
    @zohabettul7703 4 роки тому

    Why your voice make me sleep🙄🙄🙄

  • @Gurn33y
    @Gurn33y 2 роки тому

    im so fucked

  • @DIKSHIT_77
    @DIKSHIT_77 2 роки тому

    There isn't anything that you don't know.

  • @aayushhh9402
    @aayushhh9402 2 роки тому +1

    I didn't liked this teaching... Sorrry

  • @ibrahimalotaibi2399
    @ibrahimalotaibi2399 6 років тому

    Thanks for wasting 19 mins of my time for knowing nothing.