Why voltage across resistor equals voltage across battery?

00:00 Forces in & out of battery
01:58 Resistor Vs Wire
03:34 How is the current the same?
05:20 How Force adjusts 'automatically?'
6:40 Answering our question!
15:53 What is the potential difference?
17:33 Summary
18:13 One last doubt +ve & -ve!?

Why is the voltage across the resistor the same as that across the battery? Because the electric force from the battery is localised in the resistor!
This happens because the current everywhere is exactly the same!
So, when electrons gain potential energy inside the battery,
They lose all the potential energy to the resistor as heat.
Then, they don't lose any potential as they come back.
Voltage is the potential energy gained/lost per C.

Hence, the voltage across the resistor = voltage of the cell.

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[isteakahamedimon]

When your favorite teacher teaches you in his own channel! When I found you on Khan Academy, I searched for your YouTube channel. Though there were videos, you weren’t regular. Great to see you uploading lectures regularly. Take love from Bangladesh. ❤️

[michamichalski]

I am studing electrotechnics at PW (Poland) and i have to truly admit that's (and other videos) the best explenation (especially How circuts really works) i've ever heard. Despite of many bigbrain profesors (it is not an insult) nobody could explain to me these things as clearly as you did. It is a big, increadbly improtant amount of yours work. And it is not just an another courious video like many other videos "something you didnt know", it has big impact how we see the world even if we're not technician. It is our duty as humanity to keep trying understand and describe what we see accordilngy to its profession.

[fanblock_]

I can't describe how much you helped me!!!
I am a 10th grader and i had the same exact doubt which is in the video and i couldn't get it solved because of which I wasn't able to continue the chapter. I researched everywhere but my doubt was not fully clear. It may seem weird but i literally cried because i couldn't understand anything and find meaning to things and after that i gave up and thought I'll have to accept things to complete my syllabus but as i continued the chapter, I encountered another confusion, which was why does current remain same after passing through a resistor. I searched, watched many videos, didn't understand anything, watched yours, fully understood and then watched this one. You won't believe me you came like a god. I could score full marks by just understanding what's given in the book but i don't study for marks and my brain can't rest if I have a doubt. I have never commented this long on any video
Thank you sooo much sir!!!

[TimTim-gmpj]

Man, I discovered your channel a few weeks ago and I am addicted to your videos. I have already seen dozens of them. I love how you explain everything in order to understand and not to memorize.

You are the best man, greetings from germany

[Mohan-czcz]

You are amazing bro . I had asked this same question to my school teacher but no one had answer . They also understand my question that electron should have more energy but no one had courage to think in opposite to books text . You are a true teacher .❤

[xdawarson]

Remarkable explanation, helped me grasp something I couldn't in the past 10 months. You are an exceptional teacher!

[anuragdeshmukh]

Yes would like to know about the temporary state and thanks for the video you are making physics much more intresting.

[manojpandey]

Wow I just found your channel and I am really amazed by your explanations . These are explanations I always looked for. Thank you so much for your work.

[maticontal]

Mahesh, I'm very glad to have found your channel -- your videos are beautifully illustrated, concisely and thoroughly explained, and you are an engaging, very likeable teacher.
This video leaves me with one big question, however, which is, what are the implications of this explanation in the case of a circuit with no resistors?
If we remove the resistor you have drawn in your circuit, we know the voltage in the wire must nonetheless at some point go from High P.E. to Low P.E., just as in the case with the resistor.
Surely the wire does have some resistance, and rather than 'no force' being required to move an electron through the wire, the battery is doing work and the particle is reaching 'terminal velocity' (drift velocity) due to 'drag' (resistivity of the wire material)?
Please, any clarification you can provide would be hugely appreciated! As an Electrical Engineering student, I feel that getting a very firm conceptual grasp of voltage and current is absolutely paramount for my future success -- your videos so far are a beacon of light! I will be infinitely thankful for any help you can offer in addition to the huge help your videos have already been!

[aryanraj]

Simply awesome explanation!
And yaa we do want the temporary state video!
And there are 6.25*10^18 electrons in one Coulomb.

[RohitSaini-xnvd]

Yes we do wants to know the temporary state😇. Is this the transient state when current is yet to go maximum?

[tejasmallick]

Hi Sir, you came to me like a God and literally solved all of my doubts. But I only have a last doubt that as the coulombs lose all their energy in the resistor so the Voltage in the end of the resistor is 0. So how does the current flow?

[obanijesuadufe]

Ok...thanks for these last two videos. Really explanatory. Just one question though. If voltage determines how much current flows through a circuit and how fast, can we say that the voltage drop is experienced across the entire circuit though affected by the resistor alone. The reason I'm asking this is because you said in your previous video that the speed of the electron is affected by the resistance and all the electron pay the price for that resistance in their speed. I don't even know if i am making any sense.

[geetikaacharya]

First video I found on youtube from Indian creator who make such a depth content(except book authors)

[AshutoshSingh-ke]

I was so confused about voltage
Thanks for clearing it❤

[GodSahil]

thanku Mahesh i was wondering about this while studing electricity chapter from your videos.

[vishalp]

The answer where I got is only in this Channel thank you so much sir❤

[ekam]

Brother i saw your video on why current is same in series circuit and I saw many other videos on this topic but no one explained this topic as well as you did i realy like it and appreciate your work please make a video on why voltage is same and current is different in parallel circuit ?

[bjarkisigurdsson]

Fantastic video! And yes, I would like to hear more about the initial temporary state!

[anjaligarg]

Thank you for the video sir! It makes much more sense now.