MANY Students Get This Physics Question Wrong

Get Paper 3 Confident:
Here is an A Level physics style question on Kirchhoff's 2nd law in which we find the potential difference, voltage, between two parallel branches. In this question we apply a voltmeter as a bridge between the branches and use the laws of circuits to find the reading of the volt meter.
Similar questions appear often in AQA A Level Physics, but also applicable to all exam boards including OCR, CIE, Edexcel and similar courses such as IB, AP Physics and many others.
I hope this question is useful!

[zhelyo_physics]

So out of curiosity have you come across this type of problem technique in school/college? Did they solve it in a similar way? I hope revising is going well!

[thevinecompany]

hello sir! i hope you remember me 2 years ago you helped me so much in my A levels and remember I called that you would become famous haha! I come back every year to check how the account is doing I am in second year uni engineering because of you. Keep smashing it with the videos helping out students more than you believe. God bless you man

[theweekndsintern]

Interesting. My first thought was that it would be 0V since branches in a parallel circuit have the same potential difference. Why is my reasoning incorrect?

[ThanaNorman]

Awesome! It'd be nice to get a video that goes through common 6 markers and the structure to answer them if possible :)

[RoofusRoof]

Great video! Straight to the point, perfectly explained.

[ZainabBaig-lzhy]

I'm confused about why the current across resistors of 7 and 8 resistance would be the same. If there is a potential difference, won't some of the current move downwards leaving the 8 ohm resistor with less current?

[justblitz]

Sir I just wanted to say thank you so much for the help in these past few weeks. There was a video you had made about finding the voltage in a circuit using lost voltage that really helped me understand the concept, which I was able to apply in a recent test. These videos that you post about the exam tips and questions that are difficult to score are super helpful and I hope you will continue to post more like this. Thank you once again, may god bless you!

[lbrandon]

Thank you I urge you to do more of these❤

[bossgamer]

wait so you can do kirchoff's 2nd even through a loop where current won't flow? As in, current won't flow through an ideal voltmeter but we can still consider that loop?

[Anime_World]

sir, i dont understand why u add or subtract emf/voltages in a circuit with multiple sources of emfs, why did u subtract those voltages

[kskeedits]

Hi sir, what topics would you say are the most valuable to revise in terms of how often they come up for OCR A physics papers? I fell behind a lot of topics as I couldn't attend classes due to being ill. Thanks in advance :)

[My-fbtd]

How do you know which part of the branch gives positive / negative pd?

[jamieasypeasywdasqeezy]

Why doesn’t the volt meter take a reading from the other resistors surely you would need to subtract the difference from the parallel meters on the left

[physicspaper]

Hi, I'm a bit confused on how you decided if it is minus or plus?

[Xarishher]

Why did you not try the usual approach to Circuit Questions which is:
(1) Calculate Total Resistance.
(2) V = IR for Whole Circuit
(3) Calculate I
(4) Calculate Voltages of each resistor.
(5) Complete the main question asked.

[axviiaxvii]

Hello sir. I am quite confused as why you are taking away. How is it - to +?

[ayeshaniazi]

can you please solve some past papers for As level physics and explain the concepts behind each question ❤️

[ManishSahu-tg]

hey, can you make a video regarding different coordinate systems sand how is stuff like motion and all described in them, would be a great help. By the way nice video

[FunnyAstronaut-bgqd]

How much shold one spend for physic if he had to reach ipho level in 1 year daily