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AQA Physics PHYA4 - 20th June 2016 [Exam Discussion Thread] watch

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    Is there an unofficial mark scheme up anywhere by any chance??
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    (Original post by liverpool2044)
    displacement and acceleration 180 out of phase for q5 multiple choice?
    Yep
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    what was the mc answer to the one that looked like this?
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    Anyone remember what question 2bi was asking for?Answer according to thread: 28
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    for the transformer ratios, did people get the first column to be less than 1 and the second column to be more than 1?

    what letter was that?
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    How many people managed to do the derivation? It seemed like one of the hardest parts of the paper
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    (Original post by notanooblol)
    Losing 10 marks should be 120 ums, as long as you haven't lost too many more, then dont worry, I think I've lost about the same
    I hope so. I thought 63/75 would be full UMS tbh - it was about 5 marks easier than last year's but not by that much I don't think.

    I dropped 3 (missed out a step in momentum proof), at least 2 (time constant mistake), 3 I counted in the multi choice, and 2 from wordy questions I would imagine.

    There may be a couple more, but I hope not more than one or two :/
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    (Original post by SRaccount)
    Anyone remember what question 2bi was asking for?Answer according to thread: 28
    It asked for time constant, RC
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    Is it harder or easier than the 2014/2013 paper
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    (Original post by Mentalmirz)
    Ah yes I remember now, potential was increasing. as you move away from the charge, potential becomes less negative as max value is 0
    Potential was decreasing fam, it was around a positive charge
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    (Original post by tanyapotter)
    for the transformer ratios, did people get the first column to be less than 1 and the second column to be more than 1?

    what letter was that?
    Sounds familiar; I want to say B but I'm not sure.
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    (Original post by lucabrasi98)
    I can't remember my figures but did you remember to subtract the earth radius? Because if so then i got the same
    Yeah I did


    Posted from TSR Mobile
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    (Original post by duncant)

    what was the mc answer to the one that looked like this?
    5ms^-1

    Hope it helps!
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    (Original post by notanooblol)
    How many people managed to do the derivation? It seemed like one of the hardest parts of the paper
    I got it right.
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    (Original post by ombtom)
    Sounds familiar; I want to say B but I'm not sure.
    i think it's B too, but is this the right answer?
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    (Original post by Cadherin)
    I hope so. I thought 63/75 would be full UMS tbh - it was about 5 marks easier than last year's but not by that much I don't think.

    I dropped 3 (missed out a step in momentum proof), at least 2 (time constant mistake), 3 I counted in the multi choice, and 2 from wordy questions I would imagine.

    There may be a couple more, but I hope not more than one or two :/

    Yeah that's exactly what I thought, I've lost a couple in the multi choice and like 5 or 6 on section B so should be a safe 120 ums. Someone should try make an official mark scheme because we are missing a lot at the moment so really can't estimate our marks accurately
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    (Original post by perpetua)
    Is it harder or easier than the 2014/2013 paper
    Overall harder in my opinion, but easier than last year's. A similar level of difficulty to Jan 13 and Jun 12 I think?
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    (Original post by ombtom)
    Sounds familiar; I want to say B but I'm not sure.
    Yep, that option was B - that exact question has been on a past paper, it's definitely right

    Current is lower in the second coil as it's a step-up transformer (V up, I down)

    Flux Linkage is higher in the second as there's more turns on the coil.
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    (Original post by tanyapotter)
    i think it's B too, but is this the right answer?
    I got B as well
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    (Original post by tanyapotter)
    i think it's B too, but is this the right answer?
    Yes. It is a repeated question anyway.
 
 
 
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