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    If anyone's staying up for a bit and want an extra tricky 12 mark question, I just made one (technically you're practicing for two different potential 6 markers in P6 by doing this!):

    Laptops contain computer chips that are supplied by mains AC electricity. The electricity must be 'rectified' and 'smoothed' before reaching the computer chip so it is not damaged.

    State which electrical components would be used to achieve this and explain how they work. (12 marks)
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    Well I've been through all 29 pages.. Reason being is because for the Chemistry exam just before leaving the house I was reading some posts on the last page about ion exchange resin which I did not know at all and it came up as 2 to 3 marks in the exam So thank you for the noobs asking questions to the elite one (me) and I wish you all the best of luck with the exam!
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    Funny how things change, I'm no longer doing sciences for A-level :/
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    (Original post by andersson)
    If anyone's staying up for a bit and want an extra tricky 12 mark question, I just made one (technically you're practicing for two different potential 6 markers in P6 by doing this!):

    Laptops contain computer chips that are supplied by mains AC electricity. The electricity must be 'rectified' and 'smoothed' before reaching the computer chip so it is not damaged.

    State which electrical components would be used to achieve this and explain how they work. (12 marks)
    AC ---> Step Down Transformer ---> Less Rings on Secondary ---> Diode Bridge Circuit used to create DC electricity ---> Diodes reverse bias dictates a flow that always has output voltage ---> Capacitator used to smooth it out ---> charges when voltage is increasing, at maximum when voltage reaches peak ---> when voltage falls, capacitor discharges ---> keeps the ripple smaller ---> smooths out voltage
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    Good luck everyone
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    Hopefully it will be like the chemistry paper - only needing basic concepts and only applying them

    Ryan
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    (Original post by L'Evil Fish)
    AC ---> Step Down Transformer ---> Less Rings on Secondary ---> Diode Bridge Circuit used to create DC electricity ---> Diodes reverse bias dictates a flow that always has output voltage ---> Capacitator used to smooth it out ---> charges when voltage is increasing, at maximum when voltage reaches peak ---> when voltage falls, capacitor discharges ---> keeps the ripple smaller ---> smooths out voltage
    Correct
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    (Original post by andersson)
    Correct
    I'm screwed

    Vin + (R2/(R1+R2))

    Included?
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    (Original post by L'Evil Fish)
    I'm screwed

    Vin + (R2/(R1+R2))

    Included?
    Not in the specimen, so possibly not in the real exam


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    Good luck everyone


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    (Original post by BP_Tranquility)
    Not in the specimen, so possibly not in the real exam


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    Great-.- thanks anyway

    Good luck
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    (Original post by BP_Tranquility)
    Good luck everyone


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    I'm gonna need it, I only know p4

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    Wow. Hardest exam I've ever been in. I'm supposed to be happy now, because my exams are over, but I'm not.
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    How did you all find it?
    I thought it went quite well- there are a few questions that caught me out but overall, it wasn't too bad

    What did you get on the question about parachutes? I got 56 for the first part but I wasn't too sure on the second part and got 24m


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    (Original post by BP_Tranquility)
    How did you all find it?
    I thought it went quite well- there are a few questions that caught me out but overall, it wasn't too bad

    What did you get on the question about parachutes? I got 56 for the first part but I wasn't too sure on the second part and got 24m


    Posted from TSR Mobile
    I got 56 too, but for the second part I must have made a mistake as I got something like 120.
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    (Original post by BP_Tranquility)
    How did you all find it?
    I thought it went quite well- there are a few questions that caught me out but overall, it wasn't too bad

    What did you get on the question about parachutes? I got 56 for the first part but I wasn't too sure on the second part and got 24m


    Posted from TSR Mobile
    It was much better than I thought it would be. I got 56 and then I got 160 or 180 - I can't remember which one
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    (Original post by BP_Tranquility)
    How did you all find it?
    I thought it went quite well- there are a few questions that caught me out but overall, it wasn't too bad

    What did you get on the question about parachutes? I got 56 for the first part but I wasn't too sure on the second part and got 24m


    Posted from TSR Mobile
    I thought it was much easier than the specimen overall I think chemistry was easiest and biology was hardest, what about you?
    Yeah I got 56 for part A then somehow 36 for part B however I never really understood those motion equations lol so hopefully I get at least 2 marks for it what outputs did you put for the logic gates? I got 0010
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    .what was that bridge rectifier circuit actually asking for? I did the process from + and back to - again for each?


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    (Original post by BP_Tranquility)
    How did you all find it?
    I thought it went quite well- there are a few questions that caught me out but overall, it wasn't too bad

    What did you get on the question about parachutes? I got 56 for the first part but I wasn't too sure on the second part and got 24m


    Posted from TSR Mobile
    Wasn't it 56 to 4 m/s over 6 seconds?

    I got something in the hundreds which I thought made sense?

    I'm pretty sure it was something like this (180m):

    http://www.wolframalpha.com/input/?i...y%2C+6+seconds
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    (Original post by cameron262)
    Wasn't it 56 to 4 m/s over 6 seconds?

    I got something in the hundreds which I thought made sense?

    I'm pretty sure it was something like this (180m):

    http://www.wolframalpha.com/input/?i...y%2C+6+seconds
    Well, the first part of the question said you had to find the distance travelled in 7 seconds (I think), but for the second part, it didn't say how long after the 7 seconds, he opened the parachute...So I just did speed=distance/time to work it out
 
 
 
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