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# resistivity using a resistance against length graph. watch

1. 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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2. (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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