@@PhysicsOnline I always rember it as I = nevA too because of my name! When I found out my name literally spells out current in our class I was elated and made the I am Current joke too many times at the weks to follow :)
Amazing Videos, everything's simplified. I recommend this to anyone doing A-Level physics. Do you by any chance make these types of videos for chemistry as well?
Thanks for the compliment. I'm only doing physics at the moment and there are still so many more videos to make on this topic. So no plans to make similar videos for chemistry at this time.
Hi, thank you for another cool video :-)! I have a question: When you describe 'n' on the paper, should it not then be "number of charged carriers per volume", since we are multiplying with the volume when finding the current? I think you say it this way, but I was a little puzzled by the different writing.
hi Lewis, you denoted n for (the number of charger carriers) and e for (a charge, which I believe you mean the electron), but what is the difference between the charge and the charge carriers?
I think there is a small error - n is the number of electrons per unit volume and the SI unit should therefore be m^-3, rather than just a number. Very good video all said
Eh? At 2:27 you say the number of free electrons = nlA. But n is the number of electrons. But if n is the number of charge carriers, aren't those charge carriers electrons? You also refer to n as "charge density" - but n is a simple number and doesn't have the units of density, so - in a sea of satiosfied worshippers - I am confused. I see you don't typically answer people so if anyone else can explain this for me i'd appreciate it.
OK I found the answer. n is NOT the number of charge carriers, as you have written. It is the charge carrier DENSITY. That is a seriously confusing mistake to make!
It may be easier to remember it using the phrase "I never" so that I = nevA
+Rhian Davies Excellent. So obvious now you've said it, I'll be using that from now on!
I always just remembered it as nave but that's good too
@@PhysicsOnline I always rember it as I = nevA too because of my name! When I found out my name literally spells out current in our class I was elated and made the I am Current joke too many times at the weks to follow :)
good to find a well-spoken youtube teacher with good handwriting, I subscribed!
Practising your Rust electricity logic?
That's such a nice satisfying pen
lol ik i just bought a pack if em becasye of this
loving the lego examples! subbed!
this 4 min vid is better than the 1h lesson
These videos are seriously underrated(It saved my scores)
LOVE THIS SIR KEEP THE GOOD WORK UP REALLY HELPFUL LOVE THESE BEST SUB IVE EVER MADE
Amazing Videos, everything's simplified. I recommend this to anyone doing A-Level physics. Do you by any chance make these types of videos for chemistry as well?
Thanks for the compliment. I'm only doing physics at the moment and there are still so many more videos to make on this topic. So no plans to make similar videos for chemistry at this time.
+A Level Physics Online
I Completely understand, keep up the great work. :)
Great Video & Very Informative.
Awesome video! Clearing all my doubts! Is there a video on work energy and power?
Hi, thank you for another cool video :-)! I have a question: When you describe 'n' on the paper, should it not then be "number of charged carriers per volume", since we are multiplying with the volume when finding the current? I think you say it this way, but I was a little puzzled by the different writing.
+Albert Riber You're right. It should be the number of charge carriers per cubic metre.
What exam board is this? My teacher's doing AQA says I should learn it.
600th like. u deserve it
For the cross sectional
Area of the wire, is it (pie*radius^2) ?
+Joshua Mulley Yeah, he said Pi D^2 for some reason :/
+Osman Ahmed I said Pi D^2 over by 4 which is the same as Pi r^2. This is because you often measure the diameter of the wire not the radius.
A Level Physics Online Ohh right, my bad, thanks xD
Just a mistake to point out: 1:38 , it is a density, not how many there are, so when we multiply by volume we get how many
hi Lewis, you denoted n for (the number of charger carriers) and e for (a charge, which I believe you mean the electron), but what is the difference between the charge and the charge carriers?
According to my understanding,
Charge carriers are electrons.
Charge is what moves along the circuit and is carried by the charge carriers.
I think there is a small error - n is the number of electrons per unit volume and the SI unit should therefore be m^-3, rather than just a number. Very good video all said
You are correct. Because it's the number per cubic metre it should have the units of m^-3.
thank you!!!!
Doesn't n, number density of charge carriers per unit volume, have a unit of m^-3?
the unit would have to be n/m^3
a unit cannot start with an operation such as divide aka 'per'
hope this helped :)
3:38 How/Why did you bring "v" up?
nlAe was divided by l/v. Therefore it becomes nlAe multiplied by v, divided by l. Hence nAev.
do you have to know this for the AQA AS physics exam as I cannot see to find it on the spec?!
+Gloria Adebayo You don't need to know this for the AQA exams.
Eh? At 2:27 you say the number of free electrons = nlA. But n is the number of electrons. But if n is the number of charge carriers, aren't those charge carriers electrons? You also refer to n as "charge density" - but n is a simple number and doesn't have the units of density, so - in a sea of satiosfied worshippers - I am confused. I see you don't typically answer people so if anyone else can explain this for me i'd appreciate it.
OK I found the answer. n is NOT the number of charge carriers, as you have written. It is the charge carrier DENSITY. That is a seriously confusing mistake to make!
thank you so much you are amazing!!!!
Does this apply to AQA a level sir?
No it doesn’t, but it does for OCR.
Very clear ( Quality )
good video. WHICH PEN IS THAT? its awesome!
Pilot V Sign Medium - a bit thick for writing normal notes, but it writes real nice!
Do you have any vids specific to 2016 edexcel AS physics ??
+Karman Kaur I've not made any specific Edexcel videos yet. Which content are you after?
Moments which are new in the syllabus
is this part of aqa
Do we have to be able to derive the formula for A level?
+timcritt I don't think you have to be able to derive it, but I think it's a good idea to understand where these equations come from.
Yes
shouldnt n be the number of electrons PER UNIT VOLUME?
It is per unit volume
tks brother
Amazing work! I would love to get your facebook account!!
+Willson Basyal facebook.com/alevelphysicsonline/
face reveal?!?¬??!!??!!