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Edexcel Physics Unit 2 "Physics at work" June 2013 Watch

  • View Poll Results: The last question - Does resistance increase or decrease?
    It increases ( using V=IR or some other method)
    70.73%
    It decreases using the 'lattice vibrations' theory
    29.27%

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    My estimate of grade boundaries is 58/59 for an A, anyone any suggestions ?:holmes:
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    (Original post by [email protected])
    My estimate of grade boundaries is 58/59 for an A, anyone any suggestions ?:holmes:
    Too high IMO. 55. Its hardly that high for easy Unit 1 June paper, let alone a medium difficulty Unit 2 June Paper
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    (Original post by [email protected])
    My estimate of grade boundaries is 58/59 for an A, anyone any suggestions ?:holmes:
    its never been that high for unit 2, it was the same difficulty as jan 13 so I would say 56 A
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    (Original post by GCSE-help)
    Too high IMO. 55. Its hardly that high for easy Unit 1 June paper, let alone a medium difficulty Unit 2 June Paper
    Wait, you think that this exam was harder than the unit 1 ?
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    I think that initially this paper seemed all right and most of the answers i put were right, then you realise that there were a lot of trick questions that could catch you out so imo i agree with the above 55 should be an A
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    56-58
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    (Original post by [email protected])
    Wait, you think that this exam was harder than the unit 1 ?
    Haha no, but I'm saying even easy Unit 1 papers nromally have grade boundaries below 59.So its unlikely that a medium Unit 2 paper like this one will be 59.
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    (Original post by GCSE-help)
    Haha no, but I'm saying even easy Unit 1 papers nromally have grade boundaries below 59.So its unlikely that a medium Unit 2 paper like this one will be 59.
    Oh PHEW!!!
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    Really? 59 for an A? I thought it was harder than jan 13 paper...anyone?


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    (Original post by GCSE-help)
    Haha no, but I'm saying even easy Unit 1 papers nromally have grade boundaries below 59.So its unlikely that a medium Unit 2 paper like this one will be 59.
    I have to say edexcel are unpredictable *******s, for unit 4 it was a medium difficulty paper and the highest grade boundaries for that was 55 for an A and this year they increased each grade by 10 so it was something like 61 for an A and a 54 was a C grade...
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    (Original post by a10)
    I have to say edexcel are unpredictable *******s, for unit 4 it was a medium difficulty paper and the highest grade boundaries for that was 55 for an A and this year they increased each grade by 10 so it was something like 61 for an A and a 54 was a C grade...
    Hmm yeah you always get the odd shocker but mostly things stay normal. It's always good when there are some hard questions too, and this paper has that last question which people are still undecided over
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    Guys, weird question not really quoting an answer just making it up but say someone writes resistance goes up and says that I is proportional to A from the equation I=NqvA but the mark scheme says that 1 mark for getting resistance goes down and 1 mark for saying I is proportional to A or ref to I=NQVA

    would 1 mark BE GIVEN OR NOT?:hmmmm2:
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    (Original post by a10)
    I have to say edexcel are unpredictable *******s, for unit 4 it was a medium difficulty paper and the highest grade boundaries for that was 55 for an A and this year they increased each grade by 10 so it was something like 61 for an A and a 54 was a C grade...
    its true this year it was 64 for an A and the highest unit 4 boundary i saw was 56 but lets hope unit 2 wont be the same
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    Just need some physics genius to confirm the answer for the last question. Anyone know if they can get some proper confirmation from anywhere?
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    Was the gradient for the V I graph negative or positive?????
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    (Original post by Mo_maths)
    Was the gradient for the V I graph negative or positive?????
    Negative. At least I hope so.
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    (Original post by Mo_maths)
    Was the gradient for the V I graph negative or positive?????
    negative
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    The efficiency question in multiple choice is mgh/VIt It's in a book I have.

    efficiency of power output= Pout/Pin

    Pout=mgh/t
    Pin=IV

    combining the two gives mgh/VIt

    the experiment raises a mass a certain height and it's GPE calculated
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    (Original post by ALevel96)
    The efficiency question in multiple choice is mgh/VIt It's in a book I have.

    efficiency of power output= Pout/Pin

    Pout=mgh/t
    Pin=IV

    combining the two gives mgh/VIt

    the experiment raises a mass a certain height and it's GPE calculated
    But the useful energy was the kinetic energy of the mass being raised, not the gravitational potential energy.
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    (Original post by CharlieTT)
    But the useful energy was the kinetic energy of the mass being raised, not the gravitational potential energy.
    but V was constant so u mean lifting it 200 Meters and lifting it 1 meter would give same usefull power output ?
 
 
 
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