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

This physics video tutorial explains how to calculate the internal resistance of a battery when connected to a load resistor. It explains the difference between the terminal voltage across the resistor and the emf or electromotive force generated by the cell. This video contains examples and practice problem showing how to calculate the terminal voltage and the battery and the internal resistance of the cell. The terminal voltage of a battery decreases when electric current is drawn from the cell. As the current delivered by the battery increases, the terminal voltage decreases.

Electric Current In Circuits:

The Electric Battery:

Ohm's Law Problems:

Resistance and Resistivity:

Resistor Color Code:

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Electromotive Force of a Battery:

Drift Velocity and Current Density:

Potential Difference Between Two Points:

Alternating Current Vs Direct Current:

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Schematic Diagrams & Symbols:

Open, Closed, and Short Circuits:

Resistors In Series:

Resistors In Parallel:

Physics PDF Worksheets:

[sruplal]

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

[marissa]

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

[sapphireblue]

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.

[vibacourtney-battista]

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

[LifeUnfolded]

Eventhough I dont take any physic class, but I'm gonna save these video so I can learn it myself this summer time <3.

[Arkalaky]

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

[emacelikovic]

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

[agyirnana]

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

[sahitiputcha]

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

[nunu-ds]

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

[stevec]

Best explanation on this subject on YouTube. Thanks much.

[hovalgames]

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

[Og_Moose_]

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

[ryanirwin]

V. clear explanation and logical working. Thank you

[nixs]

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

[matomekgorane]

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

[nancylei]

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

[dilaraflor]

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 ?

[ayshathulthasleema]

Ur amazing sir, all your videos r very helpfull

[shadowkokufu]

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