EMF, Internal Resistance, and Terminal Voltage of Batteries Explained | Doc Physics

Some people call it a dry cell; I call it a sling blade. Mmmhmmm. We will figure out why my laptop and cell phone heat up when I use them a lot. Yay!

[what_homework]

5:38 honestly jumpscared me so hard omg

[gh]

Ohhh my God! Ah Real Teacher” please’ hear me, man’ I didn’t get my license until I saw u. I didn’t understand it at first. I was going for the biggest thing for years. Resisters were to small for me, kept fighting until I saw u, and let there be light 💡…. In the smallest thing. I fkn love u man! I had to say it… thank so much…

[MlCHOR]

lmao "told you fairies"
Thanks for the video

[alexanderbro]

If you were struggling with the find the voltage part. Add the resistances together, then divide the 13.2 V by that total resistance value. Then do 13.2 V subtract the value you got to get the voltage you are looking for

[harineeanandh]

sir, ur videos are really fun & interesting & it clears my concepts well. it looks like i don't have to got to my physics classes any more!!! thanks a tonne!!

[sanchitsanchit]

Just found this channel. I love your way of teaching, sir. Subscribed :D

[michaeldollins]

Hi Dave, Great do a better demo than do in my classes. I will be showing this tomorrow....thanks

[jimc.]

I wish I were younger, there is so much to so much!

[chilekotarsepai]

I love u and ur channel. You're a great teacher!
 Thanks man.

[secret_watcher]

im so astonished! we took this equation in our class but what I saw in this video is on another level and im glad I understood it and managed to solve for the voltages, this was entertaining thanks :)

[murad]

It would be much more helpful to the audience if you showed the working for your calculations. 

[simranjoharle]

wow those circuit problems really made it so clear for me👍

[tayson]

I need your help. I did the math but my answers are: 6.6v (for circuit 1 wherein the total resistance is 2) 1.2v (for circuit 2 wherein the total resistance is 11) 0.13( for circuit 3 wherein the total resistance is 101). I think i did something wrong.Just can"t figure out what. I used the formula V= I*R by first taking out the current across the circuit and multiplying it with 1 which is the resistance of the resistor on my left. Why is my method wrong?

[davidontiveroz]

Thank you so much for making this video sir. Helped me with physics 2 and also entertaining. Subscribed

[prateekgurjar]

13:47 what a lovely pen, where'd you get that doc, what's the brand ?

[haajarnihal]

HOW DID YOU FIND THE VOLTAGE VALUES ???

[YEUHNBD]

great video and explanations to everything! one personal opinion and you may or may not agree is i dont like that formula you proposed at the very end. because if I was to just look at that on a formula sheet, quite frankly i would have no idea where that came from or how it was derived, therefore i would not understand any theory behind it. with just getting the same answer like i did in the first couple of minutes of the video i actually remember it and it makes complete sense and makes me think. with this formula its just plugging in numbers. regardless though, awesome job and keep it up 10/10

[rpphysics]

Good explanation .simple to understand.thanq

[mahadevankm]

=New subscribers even in 2018. wonderful video Doc.

[MrPickycat]

My PHYS teacher in HS was named Schuster

Great guy.