Edexcel Physics Unit 2 25th May 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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View Poll Results: How hard was the exam ?
Extremely Easy 7 4.90% Easy 5 3.50% Average 31 21.68% Hard 62 43.36% Extremely hard 38 26.57%
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Re: AS (Edexcel) Physics Unit 2 6PH02 May 2012In a nut shell, photoelectric effect is:(Original post by avipsita)
So hiws revision going ? I dont understand the photoelectric effect cpuld somwone explain please?
You fire light at a piece of metal, photons in light transfer energy to electrons which then escape the metal. Any energy left over after escaping the metal is kinetic energy for the electrons. This piece of metal can be attatched to a circuit, and the photoelectic effect can be proven because when firing light a metal, electrons can jump a gap in the circuit and light the LED on the other side.
The light/photon must be of a high enough frequency (threshold frequency) to have enough energy to remove one electron due to the equation E=hf. The minimum energy needed for 'one' photon to remove 'one' electron is called the 'work function'. So Total energy of an electron = the work function + any kinetic energy of the electron. -
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Re: Edexcel Physics Unit 2 25th May 2012I haven't started past papers. I need to go through the book first and review stuff.(Original post by d_94)
Mines going fine.
This is re-take for me to aim a higher mark.
Hows pastpapers going for yoou?
its a retake, I see. For me its the first time, lets see what happens. -
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Re: Edexcel Physics Unit 2 25th May 2012I got a C unfortunately on that one. At least a high C, but this time I'm suree I can aim for an A. :]
Just focus on past-papers and answer ALL questions on the books, especially the revision guide, it was sooo helpful; especially on the Nature of Light; which was the hardest topic for me last year, but it's fine now. -
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Re: Edexcel Physics Unit 2 25th May 2012I see, it is indeed tough paper. You need to know alot of theory, the thing I find hard is about potential dividers lol.(Original post by d_94)
I got a C unfortunately on that one. At least a high C, but this time I'm suree I can aim for an A. :]
Just focus on past-papers and answer ALL questions on the books, especially the revision guide, it was sooo helpful; especially on the Nature of Light; which was the hardest topic for me last year, but it's fine now.
Yeh sure will do past papers, and attempt all the questions. -
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Re: Edexcel Physics Unit 2 25th May 2012Was the question about finding the magnitude of velocity and the angle around 4.47ms-1 and 63.4 degrees (about) I used 2ms-1 and 4ms-1 btw, not what i got as the horizontal and vertical components - is that alright?(Original post by UserInvalid)
Yeh it was a good paper.Last edited by AGrumpyMole; 17-05-2012 at 18:38. -
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Re: Edexcel Physics Unit 2 25th May 2012Yeh it can be right, if the mark scheme mentions range of values, for example the answer should be in range of 1-2mm e.t.c. And if you got in the range you get the mark, if not they will look over your working and give mark but may not give the mark for the right answer.(Original post by AGrumpyMole)
Was the question about finding the magnitude of velocity and the angle around 4.47ms-1 and 63.4 degrees (about) I used 2ms-1 and 4ms-1 btw, not what i got as the horizontal and vertical components - is that alright?
I used what I worked out for horizontal and vertical components. The answer I got was close to what you statet. -
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Re: Edexcel Physics Unit 2 25th May 2012(Original post by d_94)
Woowww. Thats greatt newws. Hope Unit 2 is the samme.
It may not be. Usually the re-sit papers are easy, but the actual papers which are not resit papers are hard.Last edited by UserInvalid; 17-05-2012 at 19:01. -
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Re: Edexcel Physics Unit 2 25th May 2012i remember posting in one thread to revise prefixes and stuff for unit 1 mechanics today, and guess what????? they had asked us lool. lucky guess but i had predicted it since they havent given us those kinds of questions in years. was really hoping for seatbelt, brakin and stopping distance and young modulus questions but there was none to be found.
I hope noone feels that they didnt do good today.
hope for the best, expect the best lol- my quotes lol -
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Re: Edexcel Physics Unit 2 25th May 2012Noooo!. That's not true. Usually the January papers are way harder than the June papers(Original post by UserInvalid)
It may not be. Usually the re-sit papers are easy, but the actual papers which are not resit papers are hard.
