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

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1. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
Do you think I would you lose all 3 marks for not dividing by 2 in the gamma ray photon wavelength equation if everything else was correct?...
2. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by SS*)
Do you think I would you lose all 3 marks for not dividing by 2 in the gamma ray photon wavelength equation if everything else was correct?...
Probably only lose one mark
3. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
For the question about 22% efficiency, if I multiplied by 0.22 instead of divided by 0.22 am I likely to get ecf for the next few marks? How many marks am I likely to lose?
4. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by Fing4)
For the question about 22% efficiency, if I multiplied by 0.22 instead of divided by 0.22 am I likely to get ecf for the next few marks? How many marks am I likely to lose?
i'm sure you'll get ecf for the rest of the question . i can't remember how many marks was for the first part but you may get one for using 0.22
5. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
6. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
Anyone done the unofficial mark scheme?
7. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
Any thoughts on what the grade boundaries might be?
8. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by NerdyMcNerdNerd)
Anyone done the unofficial mark scheme?
Teachercol said he'd put one on today but it has yet to materialize. I bet it will be on here soon
9. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by NerdyMcNerdNerd)
Anyone done the unofficial mark scheme?

(Original post by turtleyoga)
Teachercol said he'd put one on today but it has yet to materialize. I bet it will be on here soon
He put it up a while ago.

http://www.thestudentroom.co.uk/show...highlight=g485
10. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
Does anyone know if 39 out of 40 in coursework will get me 60/60 UMS?

Thanksss
11. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by NerdyMcNerdNerd)
Does anyone know if 39 out of 40 in coursework will get me 60/60 UMS?

Thanksss
Coursework UMS conversions are horrific, I'd imagine you'd need 40/40 to get 60/60, though very possibly 39 will round up to 60. (If not 59ish?)
12. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by NerdyMcNerdNerd)
Does anyone know if 39 out of 40 in coursework will get me 60/60 UMS?

Thanksss
in the past it has always rounded up to 60/60
13. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
If in the coursework/practical I got 35/40 what would that likely be in UMS out of 60?
14. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
Impossible to say.

You dont even know that 35/40 from one centre will score the same as 35/40 from another centre. A sample of each centres marks are moderated (remarked) then the marks for that centre may be adjusted for all students from there - up down or a bit of both or left alone!

Only after all that has happened are the marks converted into UMS.
15. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by Beresford George)
If in the coursework/practical I got 35/40 what would that likely be in UMS out of 60?
I checked last years grade boundaries and for A2 34/40 was 48UMS.
16. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
Indeed but you dont 'know' that you've got 35/40. Thats just what your teacher thinks. Unitl it's moderated, it might go down. And many do.

You wont know that until you get your result in August.
17. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by teachercol)
Indeed but you dont 'know' that you've got 35/40. Thats just what your teacher thinks. Unitl it's moderated, it might go down. And many do.

You wont know that until you get your result in August.
obviously you know better than me.. but 'many' go down? i would have thought in generally the tasks were fairly obvious whether you got the marks or not, as they were asking for specific things? Surely they would only change if the teacher did a really bad job of marking them?
18. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
I cant really comment about whether teachers have done a good job or not! Most teachers will push the boundaries to give as many marks as possible.

I've heard that as many as 50% of centres get reduced on moderation.
19. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
For the very last question, calculating the distance, I wasn't sure how to do it, so worked out using the units? I left evidence of this on the page, would I lose any marks for clearly not knowing the equation?
20. Re: OCR Physics A - G485: Fields, Particles & Frontiers of Physics - June 2012
(Original post by Ouzo)
For the very last question, calculating the distance, I wasn't sure how to do it, so worked out using the units? I left evidence of this on the page, would I lose any marks for clearly not knowing the equation?
There were various ways of doing the last question; as long as your way gave you the correct answer I'd imagine you'll be awarded all the C marks.
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