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    (Original post by ToxicPhantom007)
    Hi everybody !!
    How did your exam go ?
    Mine went really well unlike chem u3 :V
    What was your value for resistivity ?
    (something)x10^-6
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    (Original post by mira99)
    who's taking bio chem phy and math ??
    i take all of them except bio
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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.
    What was the diameter of the wire from which we had to calculate the area.
    if u remember tell the diameter.
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    can we keep current constant by keepin cross sectional area of wire constant as
    I =nqva
    isnt da purpse of da variable resistor is to vary current btw???
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    can we tell resistivity value differs because of contact resistance between connecting wires is not taken into calculation?
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    (Original post by Ahmed3651998)
    What was the diameter of the wire from which we had to calculate the area.
    if u remember tell the diameter.
    I think it was 0.56 or 0.056*10^-3
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    what did you guys answer for the question about how to keep current constant? I wrote use a variable resistor.
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    is it bad that I gave more than one answer for the last question; about why the results may be inaccurate??
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    Hey guys what did you write for the last question?
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    To determine refractive index i said use equation u=Sini/Sin r.
    I didnt mention about Plotting a Sin i against Sin r graph, and gradient = refractive index.
    So how many marks do i loose?
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    (Original post by Ayaaazzz)
    what did you guys answer for the question about how to keep current constant? I wrote use a variable resistor.
    Yeah I wrote pretty much the same thing using a potentiometer...
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    (Original post by ToxicPhantom007)
    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
    But doesn't a variable resistor also alter the current in the circuit?
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    (Original post by methrian)
    Hey guys what did you write for the last question?
    I mentioned that the wire may have gotten hotter which will affect the resistance of the wire therefore, this would have given a slightly different value (even if the calculations are correct).
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    (Original post by userk 12)
    is it bad that I gave more than one answer for the last question; about why the results may be inaccurate??
    I don't think so, it depends on the number of marks. How many marks was that question worth?
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    (Original post by don't cry-craft)
    I mentioned that the wire may have gotten hotter which will affect the resistance of the wire therefore, this would have given a slightly different value (even if the calculations are correct).
    I wrote the current wont be constant
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    (Original post by don't cry-craft)
    I don't think so, it depends on the number of marks. How many marks was that question worth?
    it was one mark but thanks
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    (Original post by ToxicPhantom007)
    Hi everybody !!
    How did your exam go ?
    Mine went really well unlike chem u3 :V
    What was your value for resistivity ?
    Mine was 1.21x10*-6
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    (Original post by Ayaaazzz)
    what did you guys answer for the question about how to keep current constant? I wrote use a variable resistor.
    same
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    i put thick lines, or ambient light
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    guys, for the comment on safety, i put relatively safe experiment/ low risk experiment
    and i got the vernier caliper question wrong, i put C
    question 7 was actually nice, it was a delightful change
    but there was a comment on whether repeat readings are appropriate or not, i wrote they are unless lamp gets hot, is that right?
    also there was list additional apparatus, i wrote protractor and pins
    also Last question, the resistivity was 1.11 x 10^-6, but i wrote it only to 2 SF, is that fine?
 
 
 
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