Electromotive Force of a Battery, Internal Resistance and Terminal Voltage

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...
______________________________
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-tutor.net/physics-b...

[@TheOrganicChemistryTutor]

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[@tatendanyoni6924]

@@Aaliyah_Matyevna hope you cope better!

[@Aaliyah_Matyevna]

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@@gautamichaudhary7313i hope he did, i hope anyone and everyone who has a test passes

[@johnholme783]

Simple no nonsense explanation. Thank you.

[@noiiiiiiiiiiiii]

It was really helpful. Thank you so much. But a liitle about how is emf generated would make it more clear 😊😊

[@NovaWarrior77]

SO AMAZING SIR!!!

[@The053199]

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

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this is the best lecture on EMF

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[@SanjaySingh-uu8zf]

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??

[@fatimaalfehaid]

Thank youu✨!!

[@rivinhewage1339]

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)

[@ksdnsdkumar1375]

@2:26 So my hand feel more shock at A then B?

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[@equinoxxx5453]

Why positive side has high potential?

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[@somnathpaul1468]

Sir, could you please explain the emf now in terms of flow of electron rather than current? Thank you, it was a great explanation.😊

[@myburntfruitloop1853]

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 :)

[@somnathpaul1468]

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[@HansensUniverseT-A]

@@myburntfruitloop1853 An electron flows from the negative terminal towards the positive terminal in a circuit...

[@ahilsarang2918]

Very good video, but i belive listening to the video in 1.25 playback speed will be the perfect speed.

[@shahkaralam8015]

thnkyou

[@orangecaprinun]

dude if i dont understand your tutorial i dont think ill ever do

[@name-rg4kw]

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

[@jefrempizz65]

Can voltage be same as EMF sometimes ?

[@5staryzzz]

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

[@name-rg4kw]

@@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?

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Why don't highschool teachers teach like him bruh I was half trippin for 2 weeks straight till I randomly saw this video

[@leonardodavinci4978]

watching this during my test

[@reemibrahim4847]

Can I put the internal resistor parallel to the battery in some cases?

[@mr.knowitall5019]

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.

[@jeremykemp3782]

why would the internal resistance in a battery increase? And what determines the internal resistance of a battery in the first place?

[@texastexas4541]

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.

[@abdulbarihussain2813]

How is the total resistance sum of the two resistors ? They are parallel to each other shouldn't they be add differently...?

[@debrajdas8591]

They aren't parallel.

[@ghostfromcod7752]

@@debrajdas8591 ya

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[@cultistofdarkness1837]

12->6->0 volts wha? I'm now even more confused how does that work?

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I think it was exaggerated to make us understand

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What is RL

[@samirsha6762]

Resistance load

[@Malia_Atangabua]

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..😐😐

[@ghostfromcod7752]

bro calculate the terminal voltage

[@shankarraknahs1821]

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Sir please try to speak louder

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thanks but i understood nothing lmao going to watch ur other video about this

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i dont like science :(

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Then why are u here

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I love science but science doesn't seem to love me

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Just pass ur tests then. After that study business or humanities or literature whatever u like.

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i like science when its easy and fun but classical physics is neither

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Speak louder 😀

[@animer4947]

Why doesn’t my teacher explain like this And my book doesn’t make that much sense either