See: http://img229.imageshack.us/img229/5353/cirlm2.th.jpg [Broken](adsbygoogle = window.adsbygoogle || []).push({});

L is varied by moving the crocodile clips along the wire.

Am I right in thinking that the current flowing will remain the same irrespective of the length?

My reasoning:

rho=AR/L

R=V/I

sub and rearrange to give:

I=AV/L(rho)

As L increases, V increases by the same proportion. A and rho remain constant. Thus, I is constant.

Thanks

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# Homework Help: Finding resistivity experimentally

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