7:09 if we put 0.66 on the top, wouldn't that give v.drop of the combined resistance I.e 0.666 and not the v drop of the 1 ohm resistor. However, question wants v.drop across 1 ohm resistor
Those two things are the same. Remember they are in parallel so the potential difference across each / both is the same so the P.D across the 1 ohm is the same as the p.d across the 2 ohm is the same as the p.d across the combination.
questionn, @14:40 why are you subtracting the voltage across them by 100V (the emf im guessing), doesnt that give the voltage that is left? becaus withouht subtracting form hundred, we already got the voltage across the resistor we chose, isnt that how the formula works?
So I'm not trying to calculate the potential difference across a resistor, I'm trying to work out the voltage at A and at B to then find the difference between them. By calculating the potential difference across the 120 ohm resistor and subtracting it from the EMF, you calculate the voltage (energy each coulomb has at a specific point) in this case A.
@@burrowsphysics ahhh i see!! thankyou so mcuh for all the replies uve given recently to me even though i asked quesiotns under videos here adn there multiple times in the span of like 3 days, adn that too so quickly, really helping me out for my finals prep
Does anyone know what to do when finding combined resistance of a 0 ohm resistor in parallel as you can't divide by zero? Do you just ignore all the other resistors in that parallel configuration and just take the combined resistance to be zero?
![[TH] 2024 PMSL SEA W3D1 | Fall | สัปดาห์ตัดสิน ทีมไปไฟนอล](http://i.ytimg.com/vi/ZBU3GyzqErI/mqdefault.jpg)
its about 4AM rn and these sirens sure keep me awake, Thanks for the video!!!!
Wow youre trying to break my ears with that siren 😂😂 nice video though thanks
Please remove that siren or reduce the volume in future videos. However, excellent video, thanks.
Nah that siren gives me life
Makes me just want to leave the video, but I have an exam tomorrow 🥲
this video was a nightmare for people in hiroshima
Explain!,,😊
7:09 if we put 0.66 on the top, wouldn't that give v.drop of the combined resistance I.e 0.666 and not the v drop of the 1 ohm resistor. However, question wants v.drop across 1 ohm resistor
Those two things are the same. Remember they are in parallel so the potential difference across each / both is the same so the P.D across the 1 ohm is the same as the p.d across the 2 ohm is the same as the p.d across the combination.
So 0.87 is p.d across 1 ohm and 2 ohm resistor as they are in parallel, thank you for helping
questionn,
@14:40 why are you subtracting the voltage across them by 100V (the emf im guessing), doesnt that give the voltage that is left? becaus withouht subtracting form hundred, we already got the voltage across the resistor we chose, isnt that how the formula works?
So I'm not trying to calculate the potential difference across a resistor, I'm trying to work out the voltage at A and at B to then find the difference between them. By calculating the potential difference across the 120 ohm resistor and subtracting it from the EMF, you calculate the voltage (energy each coulomb has at a specific point) in this case A.
@@burrowsphysics ahhh i see!! thankyou so mcuh for all the replies uve given recently to me even though i asked quesiotns under videos here adn there multiple times in the span of like 3 days, adn that too so quickly, really helping me out for my finals prep
please do more of these hard questions thanks
Yes Mr burrows ur such a legend
Honestly helped me so much, thank you
Such a helpful video, Thanks!
Damn only if this was made 2 weeks ago but kudos thanks
Yeah bro lol
Hi sir thanks for all the help :)
Does anyone know what to do when finding combined resistance of a 0 ohm resistor in parallel as you can't divide by zero? Do you just ignore all the other resistors in that parallel configuration and just take the combined resistance to be zero?
That is called a short circuit. The circuit acts as if that resistor isn't there so yes you treat their combined resistance as zero
is this really GCSE level? bc i'm struggling sm with this
I would say very top end of GCSE / A level sort of level
@@burrowsphysics okay thanks!
such a helpful intuitive insight, thank you so much!