OCR A 2019 AS Paper 1 - AS-level Physics Past Paper
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- Опубликовано: 11 июл 2024
- Paper: www.ocr.org.uk/Images/620947-...
Mark scheme: www.ocr.org.uk/Images/620969-...
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scienceshorts.net
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00:00 Multiple choice
11:03 Q21 - Forces (ball & dolphin)
14:53 Q22 - Ball kinematics
17:43 Q23 - Internal resistance, series & parallel circuits
20:56 Q24 - Refractive index & stationary waves
23:26 Q25 - De Broglie wavelength -
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The multiple choice got me shook. How is there that much working out for 1mark. Very rude
Why on Q23 a (ii) do you use p=I^2r for the power dissipated in the internal resistance, rather than p=v^2/r ( v= emf ) when I did this I got a different ratio though it seems like it’s the same thing
can you explain how you got the gradient to be 170 in question 24b thanks
its because the frequency is measured in kHz so u take 3 as 3000 and divide by a number around 17-18
@@bluejaycray8590 why would you divide by a number around 17-18 not 1/17 or 1/18
9:00 why is the answer A and not B? wouldn't the arrows go clockwise so surely the resultant arrow would be facing upwards?
Magnitude of the second arrow (on the right) is larger and steering downwards, causing the horizontal force to be propelling partially downwards as well.
14:13 why extension of A over extension of B…? The question asked for the ratio of B over A. Confusing
HOW DO YOU NOT UNDERSTAND IT?!?!?!? CUZ I DONT EITHER
HOW DO YOU NOT UNDERSTAND IT?!?!?!? CUZ I DONT EITHER
@@dave3144Tbh still don’t get it.. explain it to me when you do, thanks.
did it b over a and still got 1 as ratio so idk
@@ramens E is not referring to extension but it is referring to young's modulus. so you are doing (Fa/Ea) / Fb/Eb since you are dividing that would be the same as Fa/Ea multiplied by Eb/Fb so you get (Fa x Eb)/(Ea x Fb)
What would you say is the hardest exam board?
Ocr
0:55 me who got it wrong