EMF & Internal Resistance - A-level Physics
Вставка
- Опубліковано 18 жов 2024
- scienceshorts.net Please don't forget to leave a like if you found this helpful! -
----------------------------------------------------------------------
I don't charge anyone to watch my videos, so please donate if you can to keep me going! bit.ly/science...
me as soon as i open an exam paper 0:03
😂😂
Yes exactly
yes 😭
🤣🤣🤣🤣🤣😂
Still funny 3 years later
How is it that this along with potential dividers are so simple when I listen to videos online but as soon as I open an exam paper I feel like I'm doing pHD University level work!?!
struggled for hours of lessons with this and i understood in the first 60 seconds of this, thank you
Final year electrical engineering student here. I still needed to watch this video
good luck
@@cboy-ou2hr Thanks brother. Graduated and hoping to do a masters when things get back to normal
@@achannel1818 thats what's up wish the best
@@cboy-ou2hr 👊👊👊
@@achannel1818 have you started your masters degree?
Difficulty of a topic is directly proportional to the length of the video 😂
parth singh LOL
🤣🤣🤣🤣🤣🤣🤣
😅🤣😂😭
And inversely proportional to your marks.
So true :D
Prospective physics teacher here - I can only hope that I can explain this half as well as you do. Thanks for the content! It's really helping me out with my preparation.
you're preparing, already half way there. some of my past teachers study the subject for the first time with me in class and i end up explaining it to them instead of the opposite
Add a proportionality constant understanded lhs =rhs😂😂😂😂
one of THE best explanations ive ever seen!! the fact that I understood the whole thing in just 2 minutes is beyond me yet it happened, absolutely amazing work
your voice is so soothing its kinda hard to focus ahah
thought I was the only one 😳
He honestly has some of the mannerisms and sounds like Gordan Ramsay.
Your videos are relatively short yet you teach me more than my textbook lol
Textbooks are trash
@@الصعلوكlol Edexcel textbook is great idk if you do AQA
thank you for making short and understanding videos
Your videos are so helpful! Got my A level physics exam soon and I have been doing past papers not really knowing what information was missing/not understanding. You teach me more than my textbook and now I will progress!
may i ask what grade u got for physics ?
@@Mk-hs6ro E, I took up business a level afterwards
Got AAA in the end for biology, chem and business
@@Mk-hs6ro don't take the subject unless you're passionate about it because it's hard
@@gabijaimeeL on second thought, this channel may not really help me out in exams.
This is exactly how I am going to explain it to my students...thanks so much
Sean Barons what the heck? Teachers learn from UA-cam, no wonder they....
Best physics teacher's award goes to....
me.
Amazing video. Great job! The explanation was very easy to understand.
This really helped clarify a topic I previously didn't understand prior to watching this video.
Thank you!
Can I be honest? I was confused about internal resistance AND THANK YOU SO MUCH you opened my mind and know I understand crystal clear, but before that THE MOMENT YOU WERE TEACHING YOUR VOICE IS SO LOW but unique IT SOUNDS SO GOOD 🌝personal opinion , no offense or whatever, it's just that you really have a very sweet voice and as a 声控 it sounds so satisfying😌
U make physics a piece of cake tysm fr dis
Can you be my new physics teacher please???
+CreaShunTV Aw shucks :)
In my a levels I've lost 2 physics teachers and 3 chemistry teachers , to say it's been tough is an understatement 😂 however I'm glad this channel exists x
CreaShunTV I can
@@ScienceShorts i mean aren't being that already when you make the video ?
you're our teacher man (sorry if that sounded communist)
He is not your teacher
*He is our teacher*
Well he saved an hour and a 1/2 of my life
This video really helped me understand the emf of a battery without being too complicated, many thanks!!
Thanks a lot! Really clear and concise - perfect for revision
i was having trouble with the concept, thank you for this great explanation :)
Thanks for this. I missed my lesson on internal resistance, and this vid explained it perfectly
Thank you
This dude is the best at explaining stuff. Wish u were my teacher.
This is the best explanation I've seen on this topic, thank you very much
Nice explanation. What would make it perfect would be a practical demonstration where you calculate the value of a real battery.
See Malmesbury Science :)
Excellent video and channel. Great work.
+Fiziks Friend Cheers mate!
We all deserve a teacher like him.
Should have snapped a level outta existence
This video helped me a lot more rather than tediously reading through my textbook. Once again, thank you!
could I just ask if you are doing a video on superconductors and semiconductors
Thanks for explaining it so well. Keep it up.
I love you. I never understood this until now. I am so thankful to you. Thank you, my saviour
So i did a 2 hour physics lesson and didnt understand it but i watch ur 5min video and i completely understand now thanks
What an absolute legend. Keep it up sir.
Lifesaver! Thank you so much, these videos actually get me to understand this stuff
Thanks mate, I spent thousands of years trying to know what's an emf.
I wish this guy clears my doubt rather telling what I already know with this hope let's start watching
So...howdit gooo?
Hands of to you 👐 👐
I cannot thank you enough. You're a Goddamn angel.
This was amazing. THANK YOU SO MUCH!
I have a question that says “suggest why a chemical cell has internal resistance” anyone know how to answer it?
(Thanks for the video btw, really helped my understanding)
This may not be correct, but during the chemical reaction the battery may heat up which causes the resistance to increase. Temperature and resistance are related somehow.
You are a literal god mate appreciate it
I love you truly Science Shorts
You sound like Thor, thanks for explaining the concepts
so emf is not the rate of flow of charge produced by the power supply ?🤨 is all voltage add up (the total v?)
or do i remember wrong that's the other definition ?
Thank you, it does help me a lot! But why can’t we directly measure the potential difference across the battery?
Nice explanation thnx for it. i have exams from march 5th .this would be a lot helpful.
why was that handwriting so satisfying...
Thanku so much sir
Wow...this vid was so useful..thank you so much
inside a cell,electrons and positive charges move in opposite directions,the flow of electrons can be taken flow of positive charges in opposite direction,so that way there are two cases of flow of positive charges inside the cell,why dnt we take the net current inside the cell as 2i.
REPLY
+sachinrath123 Because whatever the current we measure in the circuit, that's only the flow of electrons. You're looking at it the wrong way round - if you really want to take into account the movement of positive changes in cell too, then they are moving at 0.5x the current.
hey there. Thank you for all the videos. you have explained it really well.
I appreciate it. however, can you please post more videos on the other chapters as well for the A level syllabus.
Thank you once again!
I just wish there was an example problem at the end to actually show how we find the gradient
When did Thor start teaching physics??
Everything about electricity
LMAOOO where do people come up with these kind of comments.. if only i could come up with such genius during exam paper
Because he is the god of the thunder
Hi. Please could you tell me whether the internal resistance should be drawn on the positive side of the cell. University Physics indicate this is the case, as well as the Eduqas A-level Physics textbook.
THANKS A LOT (Obligatory for such good explanation)
Great video, great explanation, great job.
Sorry if this is a stupid question, why is the graph of V against I in an ohmic conductor and this one different? I'm so confused revising right now.
Thanks! This really helped!
What happens to the internal resistance of a dry cell after discharging for several minutes?What happens inside the dry cell that changes its internal resistance ?
Why in the hell when you've said "oh dear" I've giggled and blushed🤦♀️😂
5:03 Why is the gradient -r? Thanks!
Hello sir. I really like your content and setup. can you plz tell me how you record your videos
yes but what do we mean with different currents? if we increase R , current is reduced and the p.d should remain constant. since V=IR
You earned a sub mate!
you saved me man thanks
thank you! so! much!
Thank you so much!!
Thanks so much, this really helped! :)
Great video thank you.
Nice video thank u sir!
man you need more subs
Wait so there will be a voltage loss at every round right? So over time, there will be no voltage since it keeps decreasing everytime the current completes one round of the circuit...am I right?
ILY i finally get it now!!!!
Tysm this is fab
That helps, Thanks.
Why exactly does the terminal p.d across the cell increase as the current decreases/ external resistance increases in terms of actual distribution of energy and movement of electrons etc?
To reduce current, you need a bigger load resistance - because what you have is effectively a potential divider, more energy is lost across R, and less across r.
Looking for what did he ment by PD?
"Potential Difference"
very usefull vedio...thank u
You are incredible
thanks very helpful, ur the best
Im getting confused with the graph bit. You're saying if you start with high current the terminal pd is low but isn,t the equation V=IR so a higher current should mean a higher Voltage?
i think if u look at the above equation where emf is a constant, so emf - IR = Ir => emf-V = Ir and so higher lower current means higher v, because i think the R changes too but not the internal r
someone check this please
like the video before you watch cuz you know it's gonna be good
Why do we not have much voltage available for the circuit when a big current is used?
How can an increase in current lead to a decrease in EMF while I and V are directly proportional?
I’d like to ask something about the graph, is it possible, in theory, to have maximum current and zero EMF? If so, what will happen and what does it mean to have zero EMF?
Thanks
you are a legend
I just did the as paper 1 and it gave us the emf and the voltage of a component and nothing else. It then asked us to find the internal resistance. How is that done?
when i only connect the volmeter to the cell, why it shows the emf. But when i connect to another parallel circuit, it shows potential difference ?
man posts this video.
Harvard : Harvard wants to know your location
Does a wire have internal resistance, or is the pd across a wire always 0V ( also a wire is an ohmic conductor isn't it?)
Wow! It helps a lot
How can we work out the heat generated in the cells per second if the current used is at 4.0A? I’m getting negative numbers.
0:45, so there would also be a measure of 5.8V with the resistor right?
Why do you say (-r) minus internal resistance instead of just internal resistance?
If we have the diagram but they dont give us e.m.f as they didn't put current =0 can we find gradient and which is r and then we can find emf?
how I sleep knowing that I'll never be part of the fraction of people who don't understand EMF and internal resistance thanks to this video:
Thank you :)