Glad to see you're finally putting ads before your videos. I've been watching for weeks and only had my first ads today. I'll never skip as you deserve the funding.
Hi sir, at 2:12 will lamp B be brighter than lamp A, as more electrical energy is being transferred per coulomb of charge into light and thermal energy, so resistance makes a bulb brighter? 2. I'm a bit confused about the definition of resistance. Can I think of it as the amount of energy required to push the electrons through the vibrating atoms? If you could please take the time to answer my questions, I would be happy because this is a part of physics I don't understand.
1. Yes (although it does depend on the type of bulb). 2. Think of resistance as the potential difference required to take a certain current through a component.
@@Freesciencelessons Thank you for clearing that up, with the help of your videos I definitely feel much more confident with electricity. (&Science in general tbh)
Hi Sir 🇨🇭 I have a really important question: what do you mean by “ the resistance tells us the potential difference required to drive a current through a circuit”. Doesn’t resistance slow down an electric current? I am struggling to understand this so please could you answer these questions sir as soon as possible sir as I have physics gcse exam next week. Ty ♥️
Resistance is the potential difference required to drive a current through a circuit. We can see that from the equation R = V / I. That's essentially the definition of resistance. For example, if a potential difference of 100V drives a current of 10A, then the resistance is 100 / 10 = 10 ohms. A current will only pass through a circuit if there's a potential difference. If you apply the same pd to two circuits, then the circuit with the lower resistance will have a greater current. You can think of it in terms of how easy it is for the current to flow (although this is not really a scientific concept, so it's just for simplicity sake and should not be used in an exam). For example, if a wire has a low resistance then that means that it's "easier" for the current to pass through. Therefore it will take less pd to drive that current, compared to a wire with a greater resistance (which is "harder" to drive a current through). I hope that helps.
Sir, can I say that in a battery, the cell that is in the wrong direction, has a negative potential difference (e.g. a p.d. of -9V)? I apologise for the these questions that may waste your free time . I am truly sorry
Sir, in some of the videos on this topic you said we won’t be given the equations on the exam. Is that still true for 2024 exams? It’s cuz i had a mock and we were given all the equations.
Is voltage basically the difference of charge between the start of the circuit to the end of the circuit? Like if the potential difference is 9 V, does the circuit start with 9 volts and end with 0 volts?
What is the difference between potential difference and energy transferred? For example how comes we use the question ‘energy transferred = charge flow x potential difference’ if potential difference is energy transferred?
You said that the current is a flow of electrons but then why is the current flowing from posotive to negative,shouldn’t it be negative to the posotive terminal
Hi. In my videos (and the spec), we use the conventional current which runs from positive to negative. Originally scientists thought that current was a flow of positive charge and the idea just stuck.
Sir, please reply. I want to know, can resistance change the amount of current or does it only change potential difference? Since in some components like a diode, current can’t flow through in a certain direction, so it would be 0A (I think) but I thought that current remains the same throughout a series circuit. I’m confused.
Those are two questions really. Firstly the diode. A diode will stop current flow if it's in the wrong direction so in that case there will be no current. In the case of the resistance, you need to look at the equation R = V / I. If we increase the resistance (but keep the current the same), then potential difference must increase. If we increase the resistance but keep the potential difference the same, then the current must decrease.
Is it possible to get a grade 9 without doing past paper questions? I feel like I've left it too late because I have only just started revising and so I won't get time to do past papers.
Excuse me sir, I've been asked for my homework to calculate the potential difference across the resistor but I've been gives the ammeter reading of 0.2 A (in a series circuit) and a cell of 3 volts. What am I meant to do? I'm confused.
If the potential difference was the same across resistors A and B, then the bulb in B would have 1/10th the current that bulb A has, since bulb B has 10x the resistance of bulb A. However, since bulb B has 10x the potential difference as bulb A, the current will be the same in both bulbs.
*his blazer has left the chat*
😂
That's what I was thinking b4 I clicked on the video
Lol
I might fail
probably a really hot english day in that blue dungeon of his
Glad to see you're finally putting ads before your videos. I've been watching for weeks and only had my first ads today.
I'll never skip as you deserve the funding.
Does skipping the ad do that?
@@samuelbarrfitness yep
Wait, so the more of the ad we watch, the more money he gets?
@@Ikiguyy Apparently
Vishal Farma Nah. If we skip, he doesn’t get anything. If we watch the whole thing, he gets paid.
You have almost singlehandedly saved my academic life, can't thank you enough for that
Love the tie, Sir
Thank you. TK Maxx, £7.99.
Wavy
Damn my guy even put the shop and price. What a GGGGGGG
Same here never thought he would take that blazer off no homo btw don't take this the wrong way lol
@@Freesciencelessons sir2drippy
i actually don't know what i would do without this guy, great teacher!
Thank you so much you don't understand how much you've helped me
Thanks for the comment. I love hearing from students who have found the videos helpful.
thanks you for free education
Dont skip the ads guys this man is saving our education 😁🦖
Petition to get this man a knighthood
👇
I sign
count me in
Yerman
*Signs aggressively*
Of course, are you kidding?
An angel in a suit, he is.
My donny on a level ur a blessed guy
😂😂😂😂😂😂😂😂
got my exam on friday and these videos have really helped with my science revision, thanks!
U got me a 9!!
Legend
what else did u do ? like past papers or what ?
@@jjcooks6002what did u get and what did u do?
my teacher tells use that ohms law is a (V)ery (I)mportant (R)ule
ugh the cringe
josh Y-C at least it helps people to memorize
@@joshy-c5389 it's literally a physics mnemonic, come on now
@@joshy-c5389 pls su😭
Who’s here at 10pm watching this the day before an exam
midnight actually
me 💀 midnight
20:29 and a couple days before the exam
1am to be exact 😀
How did it go?
lol this is the only video without his blazer XD
momin naveed NO ITS NOT HOW DARE YOU
@@K_10107 its because no one can RESIST (☭ ͜ʖ ☭)
Lol
no
Ldr mate know your free science lessons
My man looking fresh
Hench AF
tbh i wish they taught us this way earlier so i wouldn't have to cram all of this in a year.
I wanted to thank you for these videos you saved me from my exams
Free science lessons be getting me decent marks
Thanks❤️
I've learnt more from these videos than 4 years of science lessons
I gave up tutoring science since his lessons are much better. 😁 I have been recommending his videos and workbooks to any student.
Your videos saved me in my biology mock today and I’m prepping for my physics tomorrow:)
Hope they went well for u and the other guy who replied to ur comment!
What an absolute legend! You really are the best :)
Right when I needed it! Science EOY exam in 2 days.
Vexo good luck
same m8
How did it go?
@@aurora-sk6rj bruh that was 3yrs ago
Same, eoy exam in a week
Ur literally the best thing in my life 👏🏼👏🏼
this guy deserves an award thank you so much.
U should be revising scroll up g
factsss uits the last day amd im crramming
🤣
I cannot thank you anymore, I already did endless times :D
Thank you for the video, you are clear and concise. From Britain
Please can we get this man a Nobel prize
Have the test tomorrow. This helps so much, thank you 🙏
Excellent channel, thanks for the clear, succinct information.
Thank You Free Science Lessons for supporting me I have Physics Tomorrow and I haven't prepared so thank you
whoa Shaun looks clean without the blazer and that tie is nice
shaun?
His voice is so satisfying to learn from LOOL
Thank you for these videos, they are really helping me with my science x
seeing freesciencelessons without a blazer is like finding an easter egg lol, also thanks for the vid
Hi sir, at 2:12 will lamp B be brighter than lamp A, as more electrical energy is being transferred per coulomb of charge into light and thermal energy, so resistance makes a bulb brighter?
2. I'm a bit confused about the definition of resistance. Can I think of it as the amount of energy required to push the electrons through the vibrating atoms?
If you could please take the time to answer my questions, I would be happy because this is a part of physics I don't understand.
1. Yes (although it does depend on the type of bulb).
2. Think of resistance as the potential difference required to take a certain current through a component.
@@Freesciencelessons Thank you for clearing that up, with the help of your videos I definitely feel much more confident with electricity. (&Science in general tbh)
Damn nice tie dude
Thank you. It was from TK Maxx.
i really cant thank you enogh you took me from damp level where i cant understand anything to a whole new level thanks sir ❤️
Damn look at dem muscles
Can you watch his videos if you do IGCSE instead of GCSE?
IGCSE is international, I think GCSE is for Uk
@@happicorgo4138 that defo answered his question didnt it, not like he knew that
Yeah, our syllabuses are practically the same
how can we support this channel, its just so great!
Watch the ads!
4:22 made my day lol
watching this the morning of paper 2!
Hi Sir 🇨🇭 I have a really important question: what do you mean by “ the resistance tells us the potential difference required to drive a current through a circuit”. Doesn’t resistance slow down an electric current? I am struggling to understand this so please could you answer these questions sir as soon as possible sir as I have physics gcse exam next week. Ty ♥️
Resistance is the potential difference required to drive a current through a circuit. We can see that from the equation R = V / I. That's essentially the definition of resistance. For example, if a potential difference of 100V drives a current of 10A, then the resistance is 100 / 10 = 10 ohms. A current will only pass through a circuit if there's a potential difference. If you apply the same pd to two circuits, then the circuit with the lower resistance will have a greater current.
You can think of it in terms of how easy it is for the current to flow (although this is not really a scientific concept, so it's just for simplicity sake and should not be used in an exam). For example, if a wire has a low resistance then that means that it's "easier" for the current to pass through. Therefore it will take less pd to drive that current, compared to a wire with a greater resistance (which is "harder" to drive a current through). I hope that helps.
Atlast the legend removes his blazer
But how does resistance CAUSE the component to transfer energy? If the component transfers it itself?
Thanks for helping me with my homework
how does he explain something I didn't understand at all in my class in under 5 minutes??
day before exam for me....like always
Sir, can I say that in a battery, the cell that is in the wrong direction, has a negative potential difference (e.g. a p.d. of -9V)?
I apologise for the these questions that may waste your free time . I am truly sorry
jaffry jaman he said he uses conventional current
So the lower the resistance the lower the potential difference?
thank you so much for your help you really make it easy to understand
Your videos help a lot thank you :)
Sir, in some of the videos on this topic you said we won’t be given the equations on the exam. Is that still true for 2024 exams? It’s cuz i had a mock and we were given all the equations.
You are given all the equations in 2024
@@Freesciencelessonsthanks
My guy is looking fresh.
so could you say that resistance is directly proportional to potential difference and inversely proportional to current?
Yes that's correct for a fixed resistor at constant temperature.
@@Freesciencelessons okay, thank you so much for replying
Is voltage basically the difference of charge between the start of the circuit to the end of the circuit? Like if the potential difference is 9 V, does the circuit start with 9 volts and end with 0 volts?
What is the difference between potential difference and energy transferred? For example how comes we use the question ‘energy transferred = charge flow x potential difference’ if potential difference is energy transferred?
Potential difference is not the same as energy transferred but it used to calculate energy transferred.
bro carryed my life
If energy is lost in the wire then shouldn’t the voltage be less when it reaches the component
Tack så mycket bro gätte bra snälla ❤️❤️❤️❤️❤️❤️❤️🥺🥺😍🥰🥰🥰😇
Hi, do you have any videos on ohmic conductors because I can’t find any. But in my textbook it has info on them
Thanks :)
Yes you need the video called "Resistors".
@@Freesciencelessons ok thank you so much for replying :)
I wonder do you have a video on resistance in a wire?
You said that the current is a flow of electrons but then why is the current flowing from posotive to negative,shouldn’t it be negative to the posotive terminal
Hi. In my videos (and the spec), we use the conventional current which runs from positive to negative. Originally scientists thought that current was a flow of positive charge and the idea just stuck.
whos ready for 2020 GCSEs YAYYY
not me im gonna fail
Lmao corona time
This aged poorly XD
@@misscellaneous6741 hahahahaahah
What is the difference between potential difference and energy transfered?
hi sir, would the brightness of the bulb vary with the resistance? thank you for everything :)
that damn smile...
LETS GOOOOOOOOOOOOOOOOOOOO FREE SCIENCE LESSONS
physics paper 1 tomorrow. yay.
thank you free science lessons
great videos big man
Thank you sir but I didn’t really get the definition of resistance
Sir, please reply. I want to know, can resistance change the amount of current or does it only change potential difference? Since in some components like a diode, current can’t flow through in a certain direction, so it would be 0A (I think) but I thought that current remains the same throughout a series circuit. I’m confused.
Those are two questions really. Firstly the diode. A diode will stop current flow if it's in the wrong direction so in that case there will be no current. In the case of the resistance, you need to look at the equation R = V / I. If we increase the resistance (but keep the current the same), then potential difference must increase. If we increase the resistance but keep the potential difference the same, then the current must decrease.
@@Freesciencelessons so the current decreases throughout the whole circuit?
The current will decrease throughout the whole circuit.
sooooo, if a lamp has a higher resistance, will it be dimmer or brighter. I don't get this at all
do we consider the resistance 0 at the connecting wires?
if you consider resistance as zero then the equation becomes V=I(0),so I think the resistance would be one
@@MoinKhan-wv5qw at igcse we do ignore it
wheres ur blazer
Is it possible to get a grade 9 without doing past paper questions? I feel like I've left it too late because I have only just started revising and so I won't get time to do past papers.
You just saved my ass from a test
please put the link to the revision boos into the comment section many thanks
where did your blazer go
To detention
Hi 🇨🇭 it’s me again of you can could you please answer my question as I need some clarification to this topic in order for my physics exam next week
i'm surprised to see him without a blazer
cheers geoff
funny how it takes a week to learn in class but 3-4 minutes on youtube
This vid was released on my birthday wahayyyyy
Excuse me sir, I've been asked for my homework to calculate the potential difference across the resistor but I've been gives the ammeter reading of 0.2 A (in a series circuit) and a cell of 3 volts. What am I meant to do? I'm confused.
How many resistors are in the circuit?
@@Freesciencelessons just one
I think I'd really need to see a diagram to get an idea of the whole circuit I'm afraid. I'm sorry about that.
thanks for your help.
Sir I have my physics and English literature mock tomorrow I am scared. Help I haven't revised 🥺
Rewatch all of these videos multiple times, got me from 5s to 8s
@@fireemperorzuko8756 thanks mate
shaun = main man
I dont get what resistance means
he couldn’t RESIST to take his blazer off😳😳😳
can i learn all of gcse science just by watching your videos
You are the best
Shouldn’t lamp b have less current because more resistance?
If the potential difference was the same across resistors A and B, then the bulb in B would have 1/10th the current that bulb A has, since bulb B has 10x the resistance of bulb A. However, since bulb B has 10x the potential difference as bulb A, the current will be the same in both bulbs.
Thank you I received a 9 in physics GCSE
woah smart o_O
what other revision methods did you use besides these videos?
This really helped me