# Oxford PAT 2019 Unofficial Mark Scheme

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Thread starter 6 months ago
#1
PAT 2019 Paper: https://www2.physics.ox.ac.uk/sites/...inal-46208.pdf
My solutions: https://drive.google.com/open?id=1JT...1k3T7W34v2pjmq

As you may know, the 2019 PAT (Physics Aptitude Test) paper can now be found online on the Physics Department website. Unfortunately, Oxford do not release official solutions for the PAT. For this reason I have created a detailed set of handwritten solutions for the PAT 2019 based off my own work and the post-exam threads here at TSR. I hope next year's applicants will find these of use - as far as I know these are the first freely available PAT 2019 solutions online. If you have any reasonable suggestions of places where my answers might not seem correct, please let me know! Additionally, feel free to contact me if you have any further questions about my solutions. ~ NemesisRider

IMPORTANT NOTICE: on Q24, part c, the graph states Wc against Fmax. I have drawn Fmax against Wc; the shape is right, but please be aware that the axis would be swapped to be fully correct.

EDIT LOG:
V1 (4.4.20): Corrected letter answer to 1 from A to D.
V2 (18.4.20): Fixed Q12 - poor diagram and incorrect answer of A, now corrected to B.
V3 (12.9.20): Added disclaimer.
Last edited by NemesisRider; 2 months ago
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6 months ago
#2
For question 1, the answer is 4 but the choice is D not A

Also, how did you know the shapes of the graphs for q8? Is there a trick to drawing complex functions?
Last edited by FormerTailor; 6 months ago
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Thread starter 6 months ago
#3
Apologies on that one. Small slip on my part, will try and fix it ASAP.

As for how to draw complex functions, I don't think there's a trick beyond practice. With Q8, understanding the symmetry was more important than the true shapes of the graphs themselves - for example, with e^(-x^2) the x^2 term tells you the function is symmetrical as x^2 is the same for positive and negative values. Generally squared terms without any additional function that might make them change sign (e.g. sin(x) means sin(x)x^2 is not always positive) are a good thing to watch out for, if a question of that style came up again.
Last edited by NemesisRider; 6 months ago
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6 months ago
#4
Shouldn't be L=lamda/4 for Q12?
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Thread starter 5 months ago
#5
Further research reveals it should indeed be that. I think my diagram was a bit misleading (to even myself lol). I will try and correct that question, though it'll probably need a rescan (won't be til Monday). Thanks for the help

EDIT: fixed version now online. The scan quality is different but there's not much I can do there, I'm afraid!
Last edited by NemesisRider; 5 months ago
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5 months ago
#6
Looks good now. You are welcome!
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Thread starter 5 months ago
#7
If people are struggling with mine for any reason, there is another released unofficial mark scheme now that may provide slightly different solutions: https://oxfordpat.wordpress.com/2020...ford-pat-2019/
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2 months ago
#8
(Original post by NemesisRider)
PAT 2019 Paper: https://www2.physics.ox.ac.uk/sites/...inal-46208.pdf
My solutions: https://drive.google.com/open?id=1JT...1k3T7W34v2pjmq

As you may know, the 2019 PAT (Physics Aptitude Test) paper can now be found online on the Physics Department website. Unfortunately, Oxford do not release official solutions for the PAT. For this reason I have created a detailed set of handwritten solutions for the PAT 2019 based off my own work and the post-exam threads here at TSR. I hope next year's applicants will find these of use - as far as I know these are the first freely available PAT 2019 solutions online. If you have any reasonable suggestions of places where my answers might not seem correct, please let me know! Additionally, feel free to contact me if you have any further questions about my solutions. ~ NemesisRider

EDIT LOG:
V1 (4.4.20): Corrected letter answer to 1 from A to D.
V2 (18.4.20): Fixed Q12 - poor diagram and incorrect answer of A, now corrected to B.
for q24 c, shouldnt the axes be the other way around. the question asks for wc against Fmax. this will change the graph
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Thread starter 2 months ago
#9
Yes, you're right, it should be the other way around. The ultimate effect is the same as what I had but reflected in the line y=x. I imagine making that mistake in an exam would not result in a large penalty - the shape is right, it's quite a misread of the question!

Honestly, this mark scheme could have been better, but it was my first time doing something like this. I didn't want students trying to do PAT prep over lockdown without a decent free 2019 mark scheme, as was the case when it first went online. Errors like that can slip in when you rush and don't have anyone willing to peer review! I'll add a note to the first post stating the correction.
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