A metal wire has a circular cross section with radius 0.800 mm.You measure the resistivity of the wire in the following way: You connectone end of the wire to one terminal of a battery that has emf 12.0 Vand negligible internal resistance. To the other terminal of the batteryyou connect a point along the wire so that the length of wire betweenthe battery terminals is d. You measure the current in the wire as a functionof d. The currents are small, so the temperature change of the wireis very small. You plot your results as I versus 1/d and find that the datalie close to a straight line that has slope 600 A . m. What is the resistivityof the material of which the wire is made?
A metal wire has a circular cross section with radius 0.800 mm.
You measure the resistivity of the wire in the following way: You connect
one end of the wire to one terminal of a battery that has emf 12.0 V
and negligible internal resistance. To the other terminal of the battery
you connect a point along the wire so that the length of wire between
the battery terminals is d. You measure the current in the wire as a function
of d. The currents are small, so the temperature change of the wire
is very small. You plot your results as I versus 1/d and find that the data
lie close to a straight line that has slope 600 A . m. What is the resistivity
of the material of which the wire is made?
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