A conductor of uniform cross section and 60m long has a voltage drop of 1.2 V and a current densityof 2.56×105A/m2. The conductivity of the material in the conductor is___ ×107S/m
According to the Ohm’s law,
J=σE
Here, J=2.56×105A/m2
E=Vl=1.260=0.02 V/m
Conductivity of material ,
σ=JE=2.56×1050.02=128×105S/m
=1.28×107S/m