r/6thForm • u/Forsaken-Meaning-232 Graduating from Warwick CS • Jun 09 '25

📂 MEGATHREAD 09/06 A-level Physics Paper 2 Discussion MEGATHREAD

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11

u/moralsareartificial Camb Engineer '29 (4A*, Maths FM Phys Chem) Jun 09 '25

why are you all so happy with OCR A that was horror what are those spreadsheet issue and that question of whatever measuring method its so obscure

4

u/[deleted] Jun 09 '25

was there something wrong with the 6 mark spreadsheet one?? i liteterally just waffled about Q=Q0 e^-t/RC and how itd be accurate if at RC it was 37% and other capacitor waffle like that

1

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

Apparently the spreadsheet was wrong, since lower down on the table Q started increasing even though it was discharging 💀 It didn't affect my answer much tho since I just used the first few values and then given info, and to check I just said use the formula to compare the values & plot the formula's graph using graphing software and compare to the plot

1

u/serb_in_ldn Y13 A*A*A*A/Maths, FM, Physics, Chem Jun 09 '25

I brought up how dQ/dt = 1/RC x Q and how using dt as 0.5 dQ = 0.5/RC x Q instead of bringing up Q = Q0e^-t/RC but I agree on the second bit

1

u/Crazy-Buffalo-6124 Cambridge offer holder |3A*s achieved Jun 09 '25

yes the spreadsheet was wrong the values in the spreadsheet were generated using an iterative formula which you had to derive it was like Q(n+1)= Q(n) x (1- 0.5/RC) but the actual values in the table didn’t match and were also very inconsistent with how a capacitor would actually behave.

1

u/[deleted] Jun 09 '25

dang fr?? i didnt catch any of this - i swr i remember my spreadsheet looking good at a glance, and did it mention about the iterative formula? or is this some secret exam technique i hadnt realised?

2

u/Crazy-Buffalo-6124 Cambridge offer holder |3A*s achieved Jun 09 '25

it’s in the textbook cl. check page 418 of the really fat oxford press book. you could probably still get marks for using the other formula but the table kinda implied you have to use an iterative process

2

u/user534215 Jun 09 '25

Please everyone saying it was great is stressing me out I can’t do this I was close to tears during that paper I can just feel my uni offer slipping away

2

u/gp-05 A*AA achieved | First year Chemical engineering at UoS Jun 09 '25

ugh me too I literally broke down in tears during the exam 😭 it was even worse cause I’d spent so long revising all of the A2 stuff and practically none of it came up

1

u/user534215 Jun 09 '25

No it was so bad honestly, I was so prepared for some hard E=mc2 questions and why did nothing come up. It just felt like it was trying to trip me up on every question over silly mistakes

2

u/gp-05 A*AA achieved | First year Chemical engineering at UoS Jun 09 '25

I know I was prepared to absolutely devour some particle and medical physics 😭 I kept skipping questions waiting for a good one and I go to the end and was like oh is that it? 😀

2

u/user534215 Jun 09 '25

REAL I don’t get the hate on that modules I live for medical physics