GCSE Physics Revision "Resistors in Series and Parallel

[@jakubskorupa4493]

the way he says current its just the right way

[@miket7056]

Some teachers have disliked the video due to the humiliation😂

[@Isa-ue9dl]

LOOOOOOL

[@han.splash9648]

Lmao

[@meerkatking5521]

Lol

[@sapphiremoonlight23xxx6]

That's actually a good explanation to explain WHY ON EARTH ANYBODY WOULD DISLIKE HIS AMAZING VIDEOS.

[@ethanroberts1726]

Bit of a skill issue tbh

[@amyoliviaarcherrr2025]

ngl these videos teach me more than my teacher does

[@kryptickiddo8481]

that is a very common recurring theme

[@landerbennewith6169]

Of course it does! We teachers learn what to teach from this guy. You're just getting it from the source here!

[@4am_64]

this guy has become my teacher icl

[@gazey]

@@landerbennewith6169 what?!!? Actually? I thought teachers needed to have degrees or at least know igcse stuff well

[@vintxge_taetae]

@@gazeyduh😂😂 it was just a joke lmao you really think teachers can just get a job without any degree or smth??😭

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this is the primordial being i pray to before bed time

[@christianreibig2326]

this guy is literally the biggest legend ever

[@Alex-pw8jf]

Give this man a Nobel prize

[@hyper_cubed_6678]

the way he raises his eyebrows tho... what an absolute god-tier youtuber

[@Jimmylad.]

Your like a seatbelt You just saved my life!

[@naya-cole_official]

My teacher is obsessed with this man

[@Happy-xj9wv]

I got all B's and A's in my GCSE.. thankyou sooo muchhh!!! you helped me all along!! you are the best :D

[@anisha5697]

such a short video teaching me more than a whole lesson ily omds

[@emilynaylor7782]

finally I understand the resistance in parallel! Thank you!! :) , also will you be doing a level videos once the GCSEs are over? Thanks

[@FailureRLBrothers]

0:44 not given in the exam 😂😂😂, me in 2024 being the last kid benefitting from cold, such a sad life for u guys who do form 2025-2035

[@Hanifa-m1e]

Not anymore ☠️

[@oscarito4333]

for 2025 we also have equation sheets lol

[@scribbles3721]

yeah I think they’re giving it us till 2027 or 28

[@AditiBagul7532]

@scribbles3721 how do yk?

[@asmae6869]

I understand the idea that the total resistance in a parallel circuit decreases, because there is less traffic jam, but I don't understand why you said that more total current will flow through the circuit. the current at the beginning of the circuit will be the same at its end, what happens is the current is splitting through the branches, but we have the same amount of charges flowing in the total. Am I wrong? Thanks for the explanation!

[@bEEBO178]

Because in a parallel circuit, as you add more resistors, the resistance 'decreases' , which in turn 'increases' the 'total' current. This is the total opposite to a series circuit.

[@geniusgamer9877]

@@bEEBO178 Why does resistance decrease tho? If current splits between the two pathways, there should be less current flowing through each branch, right?

[@josephh067]

@@geniusgamer9877 that's exactly what I thought

[@josephh067]

@@geniusgamer9877 but I'm pretty sure its that when it splits it has more space for the electrons to flow through as other than only having one path to get through it has to so it would be a quicker flow of electrons so an increase and a decrease in resistance

[@hansgopro1]

JosephH06 basically, if there was one 500 ohms resistor, current would struggle to pass through. if you add another resistor, that 500 ohms is split into 2, so both the resistors will be 250 ohms. therefore, more current can pass through the resistors because there is a lower resistance on both ends. hence, adding more resistors decreases resistance

[@glorynyehyahm2717]

Thanks a thousand.Ifind it much more interesting than sitting in class.But please why didn't you treat the parallel section.1like 100000000thanks to GOD😀👏👌

[@henabegum2584]

Hi, thank you fot the video but can you please elaborate on ‘equivalent resistance’ please. Is it simply just replacing the resistors in series with one resistor that equals to the sum of the previous resistors..?

[@Freesciencelessons]

Yes that's correct.

[@fish2147]

i have my test tmr this guy gotta save me

[@meownamejeff]

4:24 : "More total current will flow through the circuit" How is this possible? In your Current in parallel circuits video you said "the current in the branches adds up to the total current leaving the cell" How can there be "more" total current then?

[@harlem8764]

I think it’s because we have resistors here. I don’t recall him mentioning that topic in the current in parallel circuits.

[@nellyabdou7245]

in the parallel circuit the current has more than one option as to where it can go because there are branches unlike the series circuit, therefore not all current will go through the "total resistance" it will only go through some of it. So more current will be able to flow through the circuit overall, since it didn't have to pass through all the resistors in the circuit. If it's easier, you can also think about it mathematically; R = V/I , because you know that the "total resistance" is less than the smallest resistor so basically it's small, that means the R is a small value, and for the R to be a small value the 'I' has to be a big value (assuming the V remains constant) to suit the equation, so the value of the total current has to be big. I'm not sure if that makes sense, but I hope it helped :)

[@ft983]

@@nellyabdou7245 I’ll love ty so much that helped me understand a confusing concept

[@ananyactg]

I love this channel so much

[@dittabooks9086]

2021 GCSE Physics exam today wish me luck lads

[@thunderstorm_7858]

how did it go?

[@chalicotheremapping8921]

Spill the beans

[@jakequaza3567]

4:25 why does the current increase??? sureley it should decrease since current in a parallel circuit is split

[@Freesciencelessons]

Resistors in parallel have a lower total resistance than the smallest resistor. Because I = V / R, since the resistance has decreased, the current is greater.

[@ilyaswaza8244]

@@Freesciencelessons but if its got more direction its more spread outt across so why increase?

[@araylaurence6220]

@@ilyaswaza8244 because if there if more room for the electrons to follow allowing for more electrons to flow meanings there is a increased current

[@pahgm6222]

@@ilyaswaza8244 Ok, think of it like this. You and your mates are in a very crowded hall, with closed doors. Now if they open 1 door and everyone tries to go through, it would take quite a while, but opening up 2 doors would significantly speed up the procedure, so then 3 doors would let even more people out, etc. Likewise, The electrons (you and ur mates) can reach the other side of the battery quicker with more branches(more doors). Hope this helps!

[@rich6754]

@@pahgm6222 Thanks man that analogy was useful.

[@Sarah-gd8cp]

Do I need to learn this for the 2022 GCSE exams?

[@ethanpowell4612]

love these videos, they help so much.

[@thesun4613]

4:22 - but why does the current increase? thats what i dont get :(

[@Freesciencelessons]

The lower the resistance, the greater the current (assuming that you haven't changed the potential difference). When resistors are in parallel, the total resistance is less than the smallest resistor. So the same resistors in parallel will allow a greater current than if they were in series.

[@beepduck]

3:41 yes we are

[@shalinihassani645]

Hi Sir ! One question why will the resistance by smaller in parallel circuits?

[@Freesciencelessons]

The reason is that in a parallel circuit there are more pathways for the current to flow through so the current is greater than if we had the same resistors but in series. Resistance = voltage / current. If the current has increased, then the resistance must have decreased (assuming that potential difference does not change).

[@shalinihassani645]

@@Freesciencelessons Thankyou so much !

[@MC-ps3ul]

@@Freesciencelessons but why has the current increased?

[@user-qg4td6rg5x]

@@Freesciencelessons why has the current increased

[@tate-art4574]

We have freesciencelessons for science and mrbruff for english but who do we have for maths?!?!

[@fortniteu34]

maths genie

[@fireemperorzuko8756]

@@fortniteu34 absolutely!

[@ilovechicken4658]

Gcse maths tutor

[@WEEBWHOSELLSWEED]

Can you please tell me how do I calculate the current in parallel resistors, I was asked to calculate it in my exams. Also you make great stuff.

[@Freesciencelessons]

Imagine you have two branches. Branch 1 has a resistance of R1 and branch 2 has a resistance of R2 (all in ohms), you need to use the equation 1/Rtotal = 1/R1 + 1/R2.

[@WEEBWHOSELLSWEED]

@@Freesciencelessons I see, Thankyou!

[@finlaygilzeazy9263]

Someone give this man a knighthood

[@robomonster0437]

I don’t understand the part about resistance in a parallel circuit?????????🤯🤯🤯🤯

[@Freesciencelessons]

You don't really need to understand it. If it comes up, I suspect it will be a multichoice question. Basically, the TOTAL resistance of resistors in parallel is LESS than the smallest of those resistors. And that's it.

[@robomonster0437]

Thanks 👍

[@georgep1907]

@@Freesciencelessons do we need to know the formula for the total resistance in parallel for higher? 1/R1 + 1/R2 etc

[@Freesciencelessons]

No you definitely do not need to know that formula for AQA. You just need to know that the total resistance of resistors in parallel is less than the lowest value resistor.

[@that_briish_chap3098]

pay attention to the legend of the science then!!

[@TheOmniscientAtheist]

Post graduate in EEE here, don't mind me.

[@zak7911gaming]

Sorry to disturb you but i'm having difficulty comprehending this topic.If you add the total resistance of the resistors in a parallel circuit wouldn't that surely be greater than the resistance of the smaallest resistor?Thanks

[@Freesciencelessons]

When you say a parallel circuit, do you mean for example three resistors in a branch? If you do, then yes the total resistance of THAT branch will be the sum of the three resistors.

[@zak7911gaming]

No, when there is a parallel circuit do you add the resistors and if you don't what is less than the smallest resistor?

[@Freesciencelessons]

No you don't directly add resistors in parallel. You need to use a mathematical formula that you don't need to know for GCSE. The TOTAL resistance of the resistors in parallel is smaller than the smallest resistance of any of them.

[@zak7911gaming]

I finally understood! Many thanks

[@Freesciencelessons]

The current flowing is inversely proportional to the resistance (I=V/R). The total resistance of resistors in parallel is less than the individual resistance of the smallest (in other words, the total resistance is very small). So that means that the current is now much greater. For GCSE you don't need to calculate the total resistance of resistors in parallel.

[@raymondjacksonfayad2491]

You have to know 1/Rt = 1/R1 + 1/R2 +1/R3 ... for total resistance in parallel circuits for AQA GCSE Higher

[@Freesciencelessons]

No you don't. That is quite clearly stated on page 28 of the GCSE Physics spec. filestore.aqa.org.uk/resources/physics/specifications/AQA-8463-SP-2016.PDF

[@Khadeejah-j7c]

I just wanted to ask I don’t quite understand why the resistance together will be less than the smallest resistance in the circuit aswell as how the equation for calculating the resistance ? However ur doing well with the video I learned a lot 👍

[@marymmoon1190]

if instead of ther resistor there was bulb with the same thing apply for parelel circiut?

[@josiahnjue9148]

very helpful,appreciate it

[@heatherdale2440]

Hi, so I know you said that you don’t need to learn how to work out resistance in parallel circuits, but my science teacher is making us learn it and we have a test in 4 days. I get how to work it out, cos I’m pretty good at maths, but I have no idea why the formula works - it makes no sense to me. Can you explain?? Or do you have another video/ recommend another video?? Any help would be appreciated xx

[@Arun...........]

Is that the formula with all the reciprocals?

[@amira5853]

+Arun yeah i think so

[@heatherdale2440]

Arun the 1/rt= 1/r1 +1/r2 etc thing

[@jamesshek4441]

Will there be 3 resistors in a exam paper

[@Rishi-qk2qp]

why has the total current increased when the 2 resistors are in parallel? I know there are now 2 paths for the current to take but surely the current simply stays the same?

[@Freesciencelessons]

The total current has increased but potential difference has not. Since I = V / R, the resistance must have fallen.

[@Rishi-qk2qp]

@@Freesciencelessons but why has the current increased? There have been no changes to the power supply.

[@jackclifford538]

@@Rishi-qk2qp The current has increased because the resistance has decreased. As I = V / R, if V remains the same (as it does in this case), and the resistance has fallen, then the current will increase.

[@AS-mw6pw]

Am I right in thinking that the charge remains the same, and the current only increases because current is the charge per second and so the current will split between two pathways, meaning more can flow at a given time?

[@teepark7774]

AS yeah that’s what I thought

[@worldfoods6432]

*I CANNOT FIND QUESTIONS ON UR REVISION WORKBOOK, PLEASE HELP!!!* *I went to it, but it doesn't contain any revision stuff, can u give me guidance on how to do it please??!!*

[@Freesciencelessons]

I'm releasing my first revision workbook in around two weeks. It will be Chemistry 1.

[@mikeoxlong2077]

why the resistance adds up ?

[@pahgm6222]

In series the resistance adds up cause the electrons have only one pathway to go in, it can't avoid the resistor by going through a different path. Hence, both the resistors will be met by the electrons.

[@Agamemnon1002]

The potential difference across the three resistors (as on the video example with the 20, 15 and 10 Ohm resistors) which is V1, V2 and V3 respectively, has to add up to the potential difference V of the cell. Since the circuit has no branches ( series circuit) the current I is the same through all three resistors. Using R = V/I, then V1 = I x 20, V2 = I x 15, and V3 = I x10. But, V1 + V2 + V3 = V (the potential difference across the cell) so V = I x 20 + I x 15 + I x 10 = I(20 + 15 +10). (20 + 15 + 10) is nothing more than the sum of the resistances = 45. Therefore V = I x 45 or 45 = V/I which is as mentioned above, the sum of the resistances.

[@jbarnes6570]

This isn’t related to this particular video, but why is mains electricity ac not dc?

[@eruusky]

Juliette Barnes I think it is so electricity can go to many different appliances X

[@organicwaffles3792]

Because it is generated as AC through magnets. They just leave it as AC

[@hanwong1919]

Because transformers which are required for main electricity require AC to work.

[@someone...000]

Loved the video, really helpful! Also could u pls upload a video on the required practical on resistor networks, investigating how adding resistors in series in parallel circuits affect resistance. There is no video for it in ur playlist. Thanks tho for all ur other great videos!☺

[@-Berry.]

It’s a shame I only found out about this channel the day before my mock GCSE...

[@UnKnown-bg7jh]

Good thing you can use him for your real thing!

[@aiswarya.m]

at least its not your real GCSE

[@twilightera-t4b]

Resistance tells us amount of energy (pd) needed to drive current through component. What if the current isnt carrying enough energy. Will the current after the resistor be 0?

[@dilly2047]

So can we get asked to work out resitance in parallel, or do we just need to know the resistance is less that the smallest resistor?

[@Freesciencelessons]

Just that the total resistance is less than the smallest resistor.

[@nicolejasen7700]

But why is there more current flowing through the circuit when there are more pathways, i thought that the current just splits and rejoins at the same amount it had before???

[@Arun...........]

The current does split and rejoin but the OVERALL the TOTAL current increases. This is because, by adding more resistors, there are more pathways. Therefore, overall the total resistance decreases as the current can flow thorugh more paths. Furthermore, if you look at the equation, this means the total current would have to increase. It is hard to understand in terms of the actual circuit and how the current can't just increase but understand it in terms of the equation. GCSE Physics is just a GCSE in using equations. Hope that hepls!☺🤗

[@faizankhalid6448]

if you were to calculate the resistance of the parallel would the resistance be 50 as it will be less resistance than the less resistor which is 150

[@josephh067]

sorry mate but you really messed this video up because in the second video of this playlist you say the current will come out the same in parallel circuits but now you say its more I don't understand which one is right but I'm pretty sure this one is wrong

[@Freesciencelessons]

What is said in the first video was correct, the total current leaving the branches of a parallel circuit is the same as the total current entering the branches. This video is about comparing resistors either in series or in parallel. If I take three resistors in series and measure the current passing through and then take the same three resistors and place them in parallel, the total current passing through in parallel will be greater. This means that the resistance of resistors in parallel is less than the resistance of the same resistors in series.

[@josephh067]

Freesciencelessons Yes thank you I get that part that a parallel circuit has more current but why and how does it do that. Is it because there is more circuit for the electrons to get around

[@Freesciencelessons]

In a parallel circuit, there are more pathways for the current to take so the current is greater than if the same resistors were placed in series.

[@OfficialKorSide]

Wait - but I thought that when current goes in circuit it splits at the junction? Then how is there more current in parallel? I’m confused

[@charliebrown4968]

who's here one day before the physics gcse 2019

[@tanmeetkaur9976]

Thank you so much.... really helped

[@keving1774]

What happened to the parallel resistors?

[@zillowzest5199]

You are smarter than my physics teacher

[@JackHolmesHJ]

physics paper 1 next week…

[@beepduck]

paper 2 in a week now

[@fatimamoudni1489]

*I cannot find past papers in ur revision work book!!!*

[@kamal3702]

at the end of the video where you say more current will flow because there's more pathways for the current to flow but doesn't the current flow in the direction where there's less resistance

[@Freesciencelessons]

Current will flow through every pathway. A pathway will a lower resistance will have a greater current than a pathway with a greater resistance.

[@anisasaid3817]

I love u man

[@sachinbhandari3506]

If I get a level 9 in physics I will make 10 accounts and subscribe

[@Musabkhan2006]

why didnt he explain how to calculate parallel resistor.....he only gave a half answer

[@Freesciencelessons]

It's not required in the spec and you won't have to calculate it in the exam.

[@Musabkhan2006]

@@Freesciencelessons K THANK U VERY MUCH.....U R THE ONLY ONE FROM WHOM I CAN LEARN EFFICIENTLY

[@summer-rose9131]

looks like a Coal, not a bad thing, just a name.

[@kristiyanchandarov2613]

hey are u planning on making a fortnite revision guide because i might buy it

[@NOOR-kz8jw]

Woooww thank you

[@Freesciencelessons]

No problem and thanks for the comment.

[@haiderchaudhry6224]

My guy

[@TS-rb6pn]

My teacher didn’t give me a potential difference they just gave ohm

[@Mahalovescat]

I love this giy

[@chinmaykenekar8094]

Sir,As v is directly proportional to i so when current pass through resistance means there is drop of voltage so why current is not decreasing as voltage is decreasing

[@bensavage4575]

It's like magic! It's like having a 9" pizza is so hard to eat... Then you add a 12" pizza to the table and now, to finish all of the pizza, it's easier ! :0

[@darciebenoit1408]

thank you so much

[@sarfrazahmed621]

I didn't understand the concept of resistors placed in parallel circuit:/

[@casanova5191]

Saved Partial of my life.

[@casanova5191]

Still got finals to do -_- feel like failing big.

[@dsm9857]

hate circuits'

[@lutafwatts2493]

man lyk

[@sumithsalluri3741]

Exam tomorrow gang gang

[@anonymousfan8449]

physics exam in 3 days 😱😱

[@taranp1476]

tmrw :(

[@anonalisha3413]

Thank u

[@han.splash9648]

i have one today

[@bruhmoment1196]

You look 20 and 60 in the same time

[@Khadeejah-j7c]

I just wanted to ask I don’t quite understand why the resistance together will be less than the smallest resistance in the circuit aswell as how the equation for calculating the resistance ? However ur doing well with the video I learned a lot 👍

[@Khadeejah-j7c]

I just wanted to ask I don’t quite understand why the resistance together will be less than the smallest resistance in the circuit aswell as how the equation for calculating the resistance ? However ur doing well with the video I learned a lot 👍

[@Khadeejah-j7c]

I just wanted to ask I don’t quite understand why the resistance together will be less than the smallest resistance in the circuit aswell as how the equation for calculating the resistance ? However ur doing well with the video I learned a lot 👍