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OCR A AS Physics 2019 depth (17th May) Unofficial Markscheme

How did everyone find it?

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Reply 1
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Decoder
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What did you get for the stool question where you work out the area of one leg
I thought it was a really good exam. Quite easy tbh but i'm worried the grade boundaries will be really high.
Original post by localmemelord
How did everyone find it?
It was okay I guess

Distance it travels 0.9
Voltage in Y 5.4
Chargw 10.8 C
Enrgy 58J
Velocity of Y is 1.5 the other cos current
4.6eV
Original post by Decoder
What did you get for the stool question where you work out the area of one leg


1.1*10^-4?
Density 1200
Ulpthrust 0.1?
K was like 12.54
yes that sounds very familiar


Original post by thekidwhogames
1.1*10^-4?
Can you check my other answers
We got the same answers for literally everything but what was your answer for the phase difference in radians?
Original post by thekidwhogames
Can you check my other answers
Reply 9
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peeked
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Original post by Decoder
What did you get for the stool question where you work out the area of one leg

Yeah I got 1.1x10^-4 as well
Original post by Physicsobsessed
We got the same answers for literally everything but what was your answer for the phase difference in radians?


Pi/4
Intensity ratio was 9
Reply 11
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peeked
18
For the last one I just talked about how electrons can be diffracted and how they can also produce interference patterns, hopefully explaining these 2 points was enough for the 4 marks
For the pressure question there's a range of values
Yeah and carbon atoms spacing comparable to wavelength and interference pattern
Was that for the last question?


Original post by thekidwhogames
Yeah and carbon atoms spacing comparable to wavelength and interference pattern
Reply 15
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Original post by thekidwhogames
Yeah and carbon atoms spacing comparable to wavelength and interference pattern


Aight nice, I put this too, so yeah that last question wasn't bad at all
What Pressure Question???
Original post by Ryan0887
For the pressure question there's a range of values
Sorry I meant the area
Original post by MeiSucks
What Pressure Question???
Guys I read the graph wrong and got 8.4 as intensity will I still get the marks as I squared my amplitudes
Reply 19
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Original post by Ryan0887
Guys I read the graph wrong and got 8.4 as intensity will I still get the marks as I squared my amplitudes

I think you probably will just get one mark at least (out of the 2 I think) for saying intensity is proportional to amplitude^2, I∝A²

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