OCR A AS Physics 2019 Breadth (14th May) Unofficial Markscheme

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Poll: Marks you think you got
10-20 (0)
0%
20-30 (7)
12.73%
30-40 (8)
14.55%
40-50 (15)
27.27%
50-60 (11)
20%
60-70 (14)
25.45%
That 36 Boy
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#1
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#1
How did everyone find it? Personally i was rushing towards the end cause spent too much on the MCQs. Can we start an unofficial markscheme here? Thank you!!
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AverageHuman
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#2
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#2
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thekidwhogames
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#3
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#3
It was quite easy

Power dissipated ratio is 0.334 or somerhing
Current 0.76I
Work done multiple choice is 0
Path difference is the one which diff is a multiple of 10

Force 260N
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thekidwhogames
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#4
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#4
Ratio of x 0.996?
Speed one was proof
Wavelength 8 and some power of 10
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thekidwhogames
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#5
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#5
Photo electric was routine
Ip was 0.36 and other was 1 which is nearly 3 as much
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thekidwhogames
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#6
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#6
W=n is wrong cos that's the wrong pair
Mass 6.93kg?
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thekidwhogames
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#7
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#7
Last multiple was C

V was 2 gradient cos 2 x distance between nodes
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thekidwhogames
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#8
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#8
Describing was easy then tangents and suvat and change in momentum to get f is 260
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archie.science
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#9
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#9
Was a good paper, only question i was unsure of was the compression multiple choice question right at the start? Any ideas? i think i guessed C in the end
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peeked
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#10
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(Original post by archie.science)
Was a good paper, only question i was unsure of was the compression multiple choice question right at the start? Any ideas? i think i guessed C in the end
I put B because I kind of like imagined if you bent something like that and it would be most compressed on then top in the middle (B) and most stretched on the bottom at C so yeah I put B.
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peeked
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#11
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#11
For the young's modulus ratio one where it was like E and 1.29E as the young's modulus of A and B what did you guys put as the ratio
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peeked
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#12
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#12
Okay I feel a bit more reassured now after looking at thekidwhogames replies, those answers seem similar so okay not too bad
But yeah I don't think the paper was too bad and an A will probably be like 75% ish
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thekidwhogames
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#13
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#13
(Original post by peeked)
For the young's modulus ratio one where it was like E and 1.29E as the young's modulus of A and B what did you guys put as the ratio
0.996 or somerhing as force is the tension and young modulus rearrange
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thekidwhogames
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#14
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#14
Young modulus = FL/AX

fl/ax of b = 1.29 fl/ax ofa

Cancel a and l

F/x of B = 1.29 f/x of a
U have tensions so rearrange
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peeked
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#15
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#15
Oh ofc, I completely ignored the fact that you have the tensions from previous parts of the question, that's annoying but hopefully I'll still get one of the 2 marks as I did all the working just didn't put the number in.
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Us15
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#16
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#16
What did u get for the force on the dolphin
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thekidwhogames
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#17
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#17
I can't remember just resolve

6.93kg was mass
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thekidwhogames
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#18
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#18
I think boundaries will remain the same as its slightly harder than last year which was low still
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peeked
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#19
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#19
Also can you lose marks for putting your answer to too many significant figures like for example 1.92x10^3 instead of 1.9x10^3 like do you have to do the put your answer to the number of significant figures of the least accurate given value.
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thekidwhogames
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#20
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#20
(Original post by peeked)
Also can you lose marks for putting your answer to too many significant figures like for example 1.92x10^3 instead of 1.9x10^3 like do you have to do the put your answer to the number of significant figures of the least accurate given value.
Give it tj the precision of the q but most of these calc were proof
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