Electromotive Force of a Battery, Internal Resistance and Terminal Voltage
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- Опубликовано: 2 окт 2024
- This physics video tutorial provides a basic introduction into the electromotive force generated by a battery. The electromotive force is a voltage source that increases the electric potential energy of the charges in the circuit that allows it to do useful work. Resistors, on the other hand absorb energy from the circuit and reduces the electric potential energy of a charge as it moves through the resistor causing a voltage drop. This video the difference between the electromotive force of a battery and the terminal voltage across a resistor connected in parallel to a battery. The terminal voltage is always less than the electromotive force of a battery due to the internal resistance of the battery.
Electric Current In Circuits:
• Electric Current & Cir...
The Electric Battery:
• The Electric Battery a...
Ohm's Law Problems:
• Ohm's Law Explained - ...
Resistance and Resistivity:
• Resistivity and Resist...
Resistor Color Code:
• Resistor Color Code Ch...
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Internal Resistance of a Battery:
• Internal Resistance of...
Drift Velocity and Current Density:
• Drift Velocity, Curren...
Potential Difference Between Two Points:
• Potential Difference B...
Alternating Current Vs Direct Current:
• Alternating Current vs...
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Schematic Diagrams & Symbols:
• Schematic Diagrams & S...
Open, Closed, and Short Circuits:
• Open Circuits, Closed ...
Resistors In Series:
• Resistors In Series - ...
Resistors In Parallel:
• Resistors In Parallel ...
Physics PDF Worksheets:
www.video-tuto...
Final Exams and Video Playlists: www.video-tutor.net/
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Congrats. I am struggling so much as I can't find a physics teacher of my choice. All of them are bad. They either teach wrong or don't have a good attitude for communicating with students. For now, I am surviving with these online videos. I am rlly frustrated and worried about my exms.
@@Aalijah_Matyevna hope you cope better!
@@tatendanyoni6924 thank you. I gave my physics exm 2 days ago. I did get the questions but I got nervous and messed up 10 marks almost.
@@Aalijah_Matyevna been there, hated it. But we learn from our mistakes, next time you'll know what not to do and what to do :)
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The first 20 seconds cleared up quite a lot for me.
Simple no nonsense explanation. Thank you.
I understood perfectly. You are the best teacher I ever found in physics.
This man has saved my academic career. God bless
I'm thinking I'm going to pass the CET exam thanks to this guy. Therefore if/when that happens I am going to support him by buying his merch.
Did you pass the exam dude?
@@gautamichaudhary7313i hope he did, i hope anyone and everyone who has a test passes
as someone who has a confusing physics teacher you have no idea how clear of an explainer you are. Bravo
TYSM I understand perfectly.. now i dont have to show up to my physics class where my teacher is constantly tryna POISON ME (Yes I'm serious)
Someone asked me who's organic chemistry tutor is? I said, "the wisest man on RUclips" 😂
Man....gotta thank you in person but anyway.....now I feel confident and looking forward for my final exam. Gotta say it, his explainations are way better than that of my teachers', this guy should write a book.👑🙏
Life saver!
absolute masterpiece. Best explaination of the 10 I saw.
yu do realize how many people are indebted to u
It was really helpful. Thank you so much. But a liitle about how is emf generated would make it more clear 😊😊
shout out to the most amazing person ever
been watching this channel for two years now and i just started my senior year
if the coventianal current flows opposite to the electro movement then when electrons move from high to low electric potential energy then the current flows from low to high potential??
waaah...gud explanation..kesho nko na exam
Dancan Macharia wp unasoma
Thank you so much for clearing up EMF.
I couldnt for the life of me understand internal resistance because my professor spent the entire time teaching us how to derive the super drawn out formulas and then tried to cover all of circuit 1 in the span of an hour. And hes a physics 2 professor. Internal resistance is basically like resistor being akin to a rope being pulled. The stronger the resistor the more it pulls out of the battery. The weaker the resistor the more the battery pulls back. In a sense lol
watching this during my test
my physics teacher is fucking horrible thank you for this
Very good video, but i belive listening to the video in 1.25 playback speed will be the perfect speed.
You best of the best ❤❤
Sir please try to speak louder
you can use headphones if you have.
Please clarify the following. You say electrons move from positive terminal to negative terminal and the battery adds energy to these electrons (see your arrows). But electrons MUST travel from negative to positive terminal.....that is the only way they can go. NOTHING is moving from positive to negative terminal. Electrons are produced by oxidation reactions at the negative terminal and they get absorbed by reduction at positive terminal. New electrons are produced again and the whole thing happens again. I am confused by your description. Also, PLEASE tell me which way is the electrical vector pointing.
bro casually saved my grades
Why don't highschool teachers teach like him bruh I was half trippin for 2 weeks straight till I randomly saw this video
thnkyou
Thnks a lot
dude if i dont understand your tutorial i dont think ill ever do
Hi, I'm from Bangladesh. Unlike most others I understand your teaching concept easily and perfectly
About to start my exam on electric science exam thank you
Sir, could you please explain the emf now in terms of flow of electron rather than current? Thank you, it was a great explanation.😊
Within the emf device (in this case the battery), positive charge carriers flow from the negative terminal of the battery (where there is lower electric potential) to the positive terminal (where there is a higher electric potential). The charge carriers flow in the direction of the emf arrow in a circuit diagram and in the case of an electron, the direction will be from the positive terminal to the negative terminal (because the electron is a negative charge carrier). The motion of the charge carriers is opposite that of which they would have due to an electric field between the two terminals. I hope that helps :)
@@myburntfruitloop1853 thank you.😊
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@@myburntfruitloop1853 An electron flows from the negative terminal towards the positive terminal in a circuit...
face reveal
@2:26 So my hand feel more shock at A then B?
16:00 for my ia
Why positive side has high potential?
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Thank you very much 💖😊😊
Thank you so much.
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Can voltage be same as EMF sometimes ?
No, EMF and Voltage are different.
Differences Between EMF and Voltage
:
The EMF is the measure of energy supply to each coulomb of charge, whereas the voltage is the energy use by one coulomb of charge to move from one point to another.
The EMF is represented by the ε whereas the symbolic representation of the voltage is V.
The EMF is measured between the endpoint of the source, when no current flow through it, whereas, the voltage is measured between any two points of the closed circuit.
The EMF is generated by the electrochemical cell, dynamo, photodiodes, etc., whereas the voltage is caused by the electric and magnetic field.
But they have the same SI unit: Volts
@@5staryzzz is the work done to raise to potential energy of the electrons the result of moving the negative charges against the eletrostatic force field of a positive charge which wants to keep the negative charges close to it, seeing as positive charges attract negative charges?
12->6->0 volts wha? I'm now even more confused how does that work?
I think it was exaggerated to make us understand
How is the total resistance sum of the two resistors ? They are parallel to each other shouldn't they be add differently...?
They aren't parallel.
@@debrajdas8591 ya
Can I put the internal resistor parallel to the battery in some cases?
The internal resistor is inside the battery so you can't do that. Unless you have a different type of battery which is not in my syllabus.
SO AMAZING SIR!!!
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Thank youu✨!!
this is the best lecture on EMF
why would the internal resistance in a battery increase? And what determines the internal resistance of a battery in the first place?
i really love ur videos but ur mic... gives me a bit of a headache. Im so sorry to say this. But is there anyway u can change the settings on ur mic. I know beggars cant be choosers but i thought i should point this out
thanks but i understood nothing lmao going to watch ur other video about this
is the work done to raise to potential energy of the electrons the result of moving the negative charges against the eletrostatic force field of a positive charge which wants to
*Organic chemistry
i dont like science :(
Then why are u here
I love science but science doesn't seem to love me
Just pass ur tests then. After that study business or humanities or literature whatever u like.
i like science when its easy and fun but classical physics is neither
Thumbs up! So well explained.
I always double the playspeed with this guy, he is super slow. But he's the best in youtube, I am greatly appreciated with this man.
I don't think he is.. He just teaches at his medium speed in a way every student will understand and I find it that way very excellent and helpful..
@@Bibletimewithsam Agreed
@@Bibletimewithsam yh his medium pacing acc allows you to have some time to acc understand what he’s talking bout unlike at school, where the teachers don’t even explain shit at all
Not every student gets lectures in the same speed. I am glad he has a good accent which every ppl can understand and speaks slowly.
I always get mad with my teachers cause they are super speedy. They think we already have our BSc just like them when we enter into the high school physics class 😂
26th viewer & 1st liker
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Why doesn’t my teacher explain like this
And my book doesn’t make that much sense either
What is RL
Resistance load
Ion but guys please help me out, esp u dear tutor; When I use V=E-Ir, my answer comes out differently from when I use V=IR to calculate the terminal voltage..😐😐
bro calculate the terminal voltage
YOU ARE GOD!!!
Speak louder 😀