Edexcel Physics Unit 2 January 2012
Physics exam discussion - share revision tips in preparation for GCSE, A Level and other physics exams and discuss how they went afterwards.
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Re: Edexcel Physics Unit 2 January 2012I saw a similar question of " how is a standing wave formed" in the rev guide.
key points are
-wave travels across string
-reflects at the end of the string
-incident and relected wave superpose to form standing wave
-antinodes are points constructive interference, nodes are points of constructive interference -
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Re: Edexcel Physics Unit 2 January 2012I don't remember what I must have done for the A = P/F question but I remember getting exactly 15.
And for the curtain question I mentioned total internal reflection as well. -
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Re: Edexcel Physics Unit 2 January 2012Yeah, I dropped English after AS for a REASON haha.(Original post by jake193)
Horrible paper, wasn't it? I really hate the long QWC-based questions; if I wanted to write huge amounts of stuff I'd have taken English... -
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Re: Edexcel Physics Unit 2 January 2012For last question, i wrote
-standing wave only formed when frequency is a multiple of fundamental frequency
-no standing wave is formed between multiples of fundamental frequency
-Because nL/2 has to = 2.0m(length of the string)
-Everytime, a new standing wave is formed it has 1 more antinode than before as n increase by 1
-because L is inversely proportional to f
BTW, can someone reply to my query abbt UMS grade boundaries
http://www.thestudentroom.co.uk/show...7#post36009367 -
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Re: Edexcel Physics Unit 2 January 2012Paper went well, although I completely bluffed my way through the gold leaf question, as I missed most of the lessons on this unit last year, and I only only started revising for this resit the day before :/. I ran out of time, just after I'd done the ohms SI units question, so I definitely missed 10 marks...
The rest seemed pretty straightforward, and my answers seem to match the people's here.
I doubt I'll have an A, because of the last 10 marks, but I guess whatever I get, it's bound to be better than the E I got in the June paper (still not sure how, because when I counted the max. marks I could have on that paper, I only got to 20% :P). -
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Re: Edexcel Physics Unit 2 January 2012Yh i think i did the same as you, hopefully its right(Original post by farhanyen)
For the 2 mark curtain question, my answer was
-light totally internally reflects in the core of the optic fibre
-curtain is made of optic fibre
-light does not escape the optic fibre and is only released at the bottom of the curtain where optic fibre ends
-hence only the bottom of the curtain is bright
For the surface area of the solar panel question,
-power input=power output/efficency=500/15%=3333W
-A=P/F=3333/210=16m^2 (calculator value is 15.87)
How did you get15m^2. -
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Re: Edexcel Physics Unit 2 January 2012I completely blanked on the question with the V1 and V2. I just left it in the end. I completely made up my answer on the gold leaf question and reading what people have said on here I've got it completely wrong.
Other than that I think it was all right, I just hope that I got a better grade than I did the first time around, which isn't too difficult
, because I got a big fat E on that one.
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Re: Edexcel Physics Unit 2 January 2012(Original post by Mtice)
I doubt I'll have an A, because of the last 10 marks, but I guess whatever I get, it's bound to be better than the E I got in the June paper (still not sure how, because when I counted the max. marks I could have on that paper, I only got to 20% :P).Hahaha I got an E in this paper in June too, so anything better I'll be really happy about.(Original post by hannah_smiles)
I just hope that I got a better grade than I did the first time around, which isn't too difficult, because I got a big fat E on that one.
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Re: Edexcel Physics Unit 2 January 2012Can you edit your first post and add an "Edexcel" tag for this topic?(Original post by britchick)
Mark scheme anyone?? -
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Re: Edexcel Physics Unit 2 January 2012How do I do that?(Original post by Yorrap)
Can you edit your first post and add an "Edexcel" tag for this topic? -
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Re: Edexcel Physics Unit 2 January 2012When you edit your first post;(Original post by britchick)
How do I do that?
I am not sure whether this option is available for editting after a long time. -
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Re: Edexcel Physics Unit 2 January 2012Wow thanks for the fantastic demonstration! Unfortunately I think you're right and it's probably too late to do that because no "label" part is available to edit. My apologies. I will do so though in the future.(Original post by Yorrap)
When you edit your first post;
I am not sure whether this option is available for editting after a long time. -
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Re: Edexcel Physics Unit 2 January 2012Yes I will post now(Original post by yazdan)
Anyone got the question paper?.... -
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Re: Edexcel Physics Unit 2 January 2012January 2012 grade boundaries:
http://www.edexcel.com/iwantto/I%20w...ome%20Int).pdf
A = 55/80
B = 49/80
C = 43/80
D = 38/80
E = 33/80
, because I got a big fat E on that one.
