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resistivity using a resistance against length graph. watch

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    I have worked out the resistivity of the wire we used in our experiment (using the equation A (cross sectional area) x Gradient of the graph). and got 0.471. this seems quite high, seeing as the next question is to compare to constantan, which has a much lower resistivity (5.10x10^-7). I was wondering what (if anything) I did wrong, or of this is the usual range of resistivity for different wires.

    Thank you!
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    (Original post by d_turner)
    I have worked out the resistivity of the wire we used in our experiment (using the equation A (cross sectional area) x Gradient of the graph). and got 0.471. this seems quite high, seeing as the next question is to compare to constantan, which has a much lower resistivity (5.10x10^-7). I was wondering what (if anything) I did wrong, or of this is the usual range of resistivity for different wires.

    Thank you!
    Check your unit conversions, area must be in m2 not mm2
 
 
 
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