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    (Original post by SaadKaleem)
    33 +- 1 in my opinion. I wonder if I'll grab an A, a B is for sure though.
    I'm thinking around 32 or 33 not any higher than that.Chances are looking pretty good for a B but yes you can never be sure about an A.
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    (Original post by Owais.ik)
    Yes Thats correct
    and for the question to determine the refractive index we should have said plot a graph of sin i on the y-axis against sin r on the x-axis and the gradient will be the refractive index
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    (Original post by iWant.A)
    and for the question to determine the refractive index we should have said plot a graph of sin i on the y-axis against sin r on the x-axis and the gradient will be the refractive index
    Yes (Y)
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    anyone else got a gradient of 3.91? :/
    thank god there's ECF, without that, i wouldve gotten a zero for the resistivity question
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    (Original post by afridi010)
    anyone else got a gradient of 3.91? :/
    thank god there's ECF, without that, i wouldve gotten a zero for the resistivity question
    If you are who I think you are then No
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    What was the answer for how the current can be kept constant? I wrote that a series circuit must be used with an ammeter to ensure that it is constant, but not sure about this answer.
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    i got my gradient as 5.7 and resistivity as 4.7*10-6
    do you think my values will be in the range given?
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    (Original post by Maryam hosni)
    i got my gradient as 5.7 and resistivity as 4.7*10-6
    do you think my values will be in the range given?
    I don't think so, but they'll probably give you the marks if you have done the correct calculation for resistivity
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    (Original post by Maryam hosni)
    i got my gradient as 5.7 and resistivity as 4.7*10-6
    do you think my values will be in the range given?
    Sadly I don't think so as most of the people wrote between 4.5 and 5 for gradient even below 4.5 I'm not sure but I don't think 5.7 is gonna cut it.For resistivity you might get method marks but the answer was 1.xx*10^-6 not anymore than a 1.
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    (Original post by don't cry-craft)
    What was the answer for how the current can be kept constant? I wrote that a series circuit must be used with an ammeter to ensure that it is constant, but not sure about this answer.
    I wrote variable resistor to keep the current constant
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    I got
    Gradient =5
    Resistivity = 1.23 x 10^-6
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    (Original post by Hamadtype-)
    I wrote variable resistor to keep the current constant
    same
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    who's taking bio chem phy and math ??
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    (Original post by mira99)
    who's taking bio chem phy and math ??
    me but im not taking maths
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    (Original post by OnTheHorizon)
    Sadly I don't think so as most of the people wrote between 4.5 and 5 for gradient even below 4.5 I'm not sure but I don't think 5.7 is gonna cut it.For resistivity you might get method marks but the answer was 1.xx*10^-6 not anymore than a 1.
    well all from 4.5 to 5.5 are correct
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    (Original post by don't cry-craft)
    What was the answer for how the current can be kept constant? I wrote that a series circuit must be used with an ammeter to ensure that it is constant, but not sure about this answer.
    Umm.. with this way you could just read off the current and you won't MAKE it constant ryt ? What if the ammeter reading isn't constant :V
    I wrote that use a variable resistor
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    (Original post by mira99)
    who's taking bio chem phy and math ??
    all except bio
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    (Original post by MrBioBombastic)
    well all from 4.5 to 5.5 are correct
    4.5-5 maybe coz in previous mark schemes the gradient range is not that big
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    (Original post by OnTheHorizon)
    I'm thinking around 32 or 33 not any higher than that.Chances are looking pretty good for a B but yes you can never be sure about an A.
    Don't worry coz for unit 1 and 2 A is like 55+ so make sure you get those and you will get an A. Good luck
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    (Original post by MrBioBombastic)
    well all from 4.5 to 5.5 are correct
    Is that so? Is that the usual range?
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