A. 1.0m long wire has 1mm diameter and resistance of 7 ohm.calculate the resistivity of the materials
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Resistance=7ohm
Length=1m
Diameter=1mm=1/1000=0.001m
Radius=diameter/2=0.001/2=0.005m
Resistance =resistivity×length/area
7= resistivity×1/0.005
7×5/1000=resistivity
0.035=resistivity
Length=1m
Diameter=1mm=1/1000=0.001m
Radius=diameter/2=0.001/2=0.005m
Resistance =resistivity×length/area
7= resistivity×1/0.005
7×5/1000=resistivity
0.035=resistivity
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