a wire of length 1m and radius 0.02cm has resistance of 5.0ohm calculate the resistivity of the wire
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L=5m
r=0.02 cm =2×10^-4m
Area=πr²
=22/7×4×10^-8
Resistance=p×l/A
5=p×5/π×4×10^-8
p=π×4×10^-8
p=(22/7)×4×10^-8
p=88×10^-8/7
p=12.57×10^-8
r=0.02 cm =2×10^-4m
Area=πr²
=22/7×4×10^-8
Resistance=p×l/A
5=p×5/π×4×10^-8
p=π×4×10^-8
p=(22/7)×4×10^-8
p=88×10^-8/7
p=12.57×10^-8
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