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OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012

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I'm just going to put it out there, that sucked balls.
Reply 981
Original post by DavidMRoper
I'm just going to put it out there, that sucked balls.


Concur, really wasn't on form for this exam. Theory questions were fine though.
GRADE BOUNDARY PREDICTIONS, half way between June 11 & Jan 12 ?

therefore
UMS------------raw
150/150--------83
135/150--------77
120/150-A------70
105/150-B------63
90/150-C-------57
75/150-D-------50
60/150-E-------43


I'm just a student, there is no reason to believe me :L
That was tough, even with extra time I didn't finish everything :frown:


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Reply 984
I thought the questions were ok, but for some reason I felt really pushed for time :s-smilie:
i just really wasn't on form at all today. Doing my head in! Did manage to save some marks though, by correcting a mistake in converting cm to m :L
I got Bum Raped by Physics G485 ... Happy Days -.-

I think i lost 30 marks :|
Wtf OCR. Why do this. There goes my A!
Reply 988
Original post by JuxtaposedJames
Wtf OCR. Why do this. There goes my A!


What bits did you find hard?
Everyone predicted Evolution of universe will come up and it did!

was it 6/7/8 marks i cant remember?

for the wavelength of the gamma rays did we have to divide the KE of the photon by 2, because there were 2 gamma rays in the diagram?
(edited 11 years ago)
Reply 990
the calculations took so much time, but luckily i decided to do the written bit first. i only had one question left over and that was the flux linkage/time graph which i knew but ran out of time so i couldn't do it
Oh dear that was not good. Boo hoo.

Hoping grade boundaries are low, but unlikely.

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Original post by Tomcrease
What bits did you find hard?


All the maths just really tested me!
did anyone show that the maximum EMF was 12V? me and a few other people got 8V, if you got 12V how did u do it?
Original post by chemengmeng
did anyone show that the maximum EMF was 12V? me and a few other people got 8V, if you got 12V how did u do it?


you had to work out the max. gradient.

change in y over change in x..mine came out as 12.8V
Original post by chemengmeng
did anyone show that the maximum EMF was 12V? me and a few other people got 8V, if you got 12V how did u do it?


gradient of the graph man
Original post by chemengmeng
did anyone show that the maximum EMF was 12V? me and a few other people got 8V, if you got 12V how did u do it?

Find a tangent on the steepest part
That was AWFUL! Btw are we allowed to discuss this?

Also, grade boundaries predictions?
Will anyone post solutions?
Original post by chemengmeng

for the wavelength of the gamma rays did we have to divide the KE of the photon by 2, because there were 2 gamma rays in the diagram?


Don't think you could use KE as it's a photon, I used E=hc/lambda
Where E was half the energy of whatever you'd just worked out
Reply 999
Thanks everyone who predicted the evolution of the universe :biggrin:

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