Physics | Electric circuits | EMF and Internal resistance (Made simple)
ฝัง
- เผยแพร่เมื่อ 28 ส.ค. 2024
- A simplified explanation of when EMF (Electromotive Force) is and how it affects calculations in circuits and Internal resistance. It's made so simple, even a 3-year-old would understand... Lol. Enjoy!!!
this is me in 2024 ready to become the future medical student , thank you so much uncle if i was rich i would have bought you a car😅, but i know if i put more effort in my studies and then inject some of your best videos , who knows ,i will find myself in stellenbosch and taking a picture with you and sharing a testimony of your best work , dont stop , i promise you will go far. thank you so much uncle. although i am a bit scared i know i will make it, as they say some things look hard until you do go through them.
I plan to watch all of your videos in order for me to do well for my upcoming trials. Thank you sir, you are awesome!
It is my absolute pleasure. Thank you
My absolute pleasure...
I wish I could send you a voice note, just so you can hear how much I appreciate you😭😭May GOD bless you for the lovely work you do👏🏼👏🏼
Wow, thank you. Please send an email...
Do u have a friend that teachers maths as you ?? I’m struggling to understand matrices and vectors 🤦🏾♂️🤦🏾♂️💔
@@djtonict6629 Yes... Email me, I'll plug you in
Mr Nkosi ❤ I'm forever grateful... i saw these videos and downloaded them for my matriculating sister. I watched them too and wow🤧❤ you're fantastic .. sometimes i can't explain to her that well coz i did my matric in 2019. And this is the best help she could get
You’re welcome ☺️
best spent 36min of my life, been struggling with this topic for 2 years
My pleasure 😌
I’m watching this video during loadshedding and i can say that you have shed the light.
😂
Wow!!! What a pun
I didn't understand the whole concept of calculating questions with multiple resistors until now. Thank Youuu 💕
You're welcome 😊
Everything is clear now may Lord be with you and bless you more😊
Hi!
I writing physics tomorrow and you just saved my life!
Best of luck and You're welcome...
This video honestly helped me understand the internal resistance. Thank you very muchh. The video was simple, brief, and clearly explained. Amazing!!
This realtor helped a lot I'm upgrading
I'm definitely subscribing and coming back for more!!! You made it so understandable and simple. THANK YOU SO MUCH!!!! 🙏
Welcome to the family Buyile... Thank you very much. Check out other phenomenal lessons we've put together for your convenience.
Thanks sir I never thought I would ever understand circuits 🙏
Thanks man you made physics as simple as L.O I wish you were my teacher I've could past physics with excellent I wish all the best on your career keep helping children god and your ancestors will bless you with many years.
Thank you so much Liyema 😊
For V2 I started by calculate voltage across 12ohm resistor because the current that flows there is the total current which is 0,8A then I got the answer of 9,6V thereafter I said Vexternal which is 24 minus 9,6 then I still got 14.4v as my V2... Many ways to kill a cat. However I learnt a new trick from you sir. Your work is much appreciated will definitely be referring my students to this channel.
You're so right... Many ways to tackle circuits. Thank you so much sir.
Your learners are most welcome. It will save from a lot of work on revision for the prelims
@@MlungisiNkosi Most definitely.
God will bless you sir. I hope i can one day be of some kind of use to you as well. I can't believe i used to think electricity was hard. You are the best.
Definitely subscribing and coming for more😊
THE PLUG FOR REAL 👌🏽 thank you sir... highly appreciated 🙃
Any time!
Sir you are the best. i just listened to your explanation at the beginning of the video and the previous videos on resistors in series and parallel. i tried to do this question by myself before seeing how you did it and i applied everything you taught and i got everything correct. this was once a difficult section for but i can assure you that with how you explained it, it is now one of the best. thank you🥰
You are most welcome 🤗
Not me getting everything right on my first attempt, all thanks to you sir😊
Woooppp wooooppp 🥳🥳🥳🥳🥳🥳
You make me fall in love with school🥰
It’s a blessing hearing that
Hey sir please do prelim past question papers . I have been watching all of your videos and I should say that I understand Physics better now. Thank you.
You're welcome... I know those Prelim papers do show you flames. I will do those and past IEB paper solutions.
Question...define emf.
Me: emf is pressure in 😂,thank you so much sir🤗.
😂😂😂😂😂😂
That's not the formal definition though... But it helps with understand in the concept
I did not do this in class yet but it was really made simple
You'll see just how it will help you understand even better in class.
The best teacher ever!!!!
Thank you...
This was so helpful thanks sir I really appreciate you. ❤️🖇️
What a privilege it is for me. Thank you
You are the best MR dankoh
I plan to watch all your video okay thanks sir
All the best
Your the best ❤️❤️❤️❤️!!!!!!! Thanks so much, you saved me🤞
You're welcome
this video has been very helpful
You’re most welcome
Greetings uncle Mlu..were we not supposed to use 45 instead of 18 ohm's when calculating v2?
im confused too
Wonderful.
Still waiting for that prelim preparation vid😊😁
It’s coming 😊
sir for question 3 I did the following: current in A2: V2/R : 14.4/45 = 0.32Ampere.
then current through 10 ohm resistor = total current - current in A2 = 0.48A
V3=IR
0.48 X 10 = 4.8V?
That is perfect…
Thank you
Made easy indeed... definitely sharing this with my friends 😎🥵🥵
Thank you so much. I wish you could've joined us sooner. However, as the saying goes, better late than never. All the best for your exams
Please do electric circuits past papers question. Thank you this has been helpful 😊❤️
You're welcome... I will be doing a lot of past exam questions towards the prelims. Keep your eyes peeled 😊
Thank you sir for another amazing video ❤😭
You’re welcome
Oh, here it is💗. Wanted one of this kind
Awesome. I'm glad you found it 😊
For question 2 you use 18 ohms to determine V2 but use 10 ohms for V3 why don't you use 45ohms for V2 if you'd use the 10 in V3
I'm not sure I follow...
@@MlungisiNkosi i believe they meant to ask why when calculating V3 you use 10 ohms and not 18 ohms(R//) like you did for V2 and id like to know why we used 30 ohms(R ext) and not 18 ohms(R//) for I2(A2)
My friends will be hearing about you!
Thank you. You are a good friend
Thank you so much sir Friday I'm writing about this topic thanks for helping me ❤️🫂
Hi Mlungisi I've been watching your videos and they are very helpful however I've been researching what would be considered a bad internal resistance for a battery for instance if I have a 2V Cell with internal resistance of 0.25 mili ohms what but when I test the IR I get something like 0.75 mili ohms would you say that's Bad or my battery still has some life in it
Ideally what you would like is to have zero internal resistance… However, that’s impractical in real life. What you do want though is for most of the power to be utilised towards whatever load the battery is trying to supply.
Your the best mr
Thank you so much sir
hey Sir I don't understand why V1 and V2 are not equal, since they are connected in parallel...😩 akerr Vp=V1=V2...+Vn
Thank you so I am writing tomorrow sir🙏
All the best
Thank u very much sir ...God bless you
You’re welcome ☺️
GOD BLESS YOU SIR
You’re most welcome
finally i understand. dankie Meneer
Hello sir I want to know if it's wrong to say 1/45 + 1/20 + 1/10 when calculating for the parallel resistance?
No, there's nothing wrong... However, you still need to invert the answer to that sum to get the effective resistance.
ngiyabonga baba mlungisi🤝
You’re welcome
When calculating the V2, why did we not say it is equal to 24V as it parallel with the Vtotal?
That would've been the case if we didn't have the 12ohm resistor on the side... Some of the potential goes to that 12ohm resistor.
Therefore the voltage across V2 cannot equal Vext (Vtotal)
Oh the Voltmeter readings in parallel are only equal when there aren't any other voltmeters placed in series?
When calculating the internal restistance why did we not say, emf-Vexternal =r, which will give us 2ohms
@@thando7786 emf - Vext = Vinternal (the voltage across the internal resistance)
You may subsequently calculate the internal resistance: Vinternal = Ir (I is the total current)
Hy Mr mlungisi...what will happen to a voltmeter reading..if you connect a negligible conductor ..let's say maybe they gave u point p and q and that where the negligible conductor is connected
Where is the conductor connected?
Thank You So Much!!🙏🏿❤️
You're welcome
Sir, if you can, may you please make a video on electrolytic cells before Mondays paper. Will be greatly appreciated.🙏🏿
I can't promise but I'll do my best
Hi sir can you please explain again why the volmeter V2 is for the 30 resistance aswell
I think you might need to check the videos before this one on circuits. It will help develop your understanding much better
@@MlungisiNkosi thank you sir 🙂
So the total current Yama external is equal to the current ye internal?
Yes
sir im trying to understand why when calculating I2 we use the total R ext and not R//
Please provide time stamp
@@MlungisiNkosi 29:29
Thank you so much sir ❤️..Could you please make a video on Probability and Counting principles for maths
I will get there eventually. I’ll finish Trigonometry and then Euclidean Geometry thereafter because those are huge sections
Thank you sir
Thank you Sir
thank you so much 😭😭❤️ wow
My pleasure 😇
Thank you Sir!😃
You're most welcome
When will you do circuits with switches? 😶
Let me do the last part of Photoelectric effect today and then I'll get back to circuits
@@MlungisiNkosi thanks chief, your videos make physical sciences an easy subject 💯
@@kimalale Danko!!! 😂
you+ miss angler =high 80's
I’ll be collaborating with her next year
Value for current to we round it to one decimal place or two
It will be as per examiner's instruction.
2030 I will comeback here ....
THANK YOU 🤭🤭🤭🤭🤭🤭🤭🤭🤭🤭🤭🤭
You’re welcome
Thanks a lot..
You're welcome
Oh I'm covered sir
Sir Mlungisi always coming clutch.
You're welcome
Can u please do Heat transfer 🙏🙏🙏
Perhaps next year... 😊
Help me summary for physics from the beginning until the end grade 10-11 thanks sir
You’re welcome to contact me for sessions on +27721981200
Tomorrow we are writing, I'm busy now with electricity as I'm writing this message
I've got you covered 😉... All the best for tomorrow.
danko 🙏🏼✨
Lol... Heita
Watching the videos till this far and still not understanding is soo wrong 😢😭
You should start the playlist from the beginning
I@@MlungisiNkosii understand neh but issue is when you have to apply my understanding to this ...i get sooo lost or use the wrong values
@@MlungisiNkosiwhat also throws me off is what current passes through the ammeters
❤️
My favourite 😍
This vd is very confusing
Even though the others are the best kdw le ang understandi
Askies… kwala kuphi?