A 4.m long wire has diameter of 0.30 mm .if its resistance is 30ohms find its resistivity and conductivty
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R=300ohm
Resistivity=1/R=1/300=3×10-³
Conductivity = 1/resistivity=1/3×10-³=300
Resistivity=1/R=1/300=3×10-³
Conductivity = 1/resistivity=1/3×10-³=300
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