Question
Sat July 14, 2012 By: Tejvir
 

if electric field inside a conductor is 0 but potential is not 0 why

Expert Reply
Sat July 14, 2012
Electric field is defined as rate of change of potential.
Since electric field is zero it means potential is constant. It does not mean that potential is zero, it might be a finite value.
Physically in a conductor, there is  a sea of free electrons. SO when we put a say positive charge on surface the electrons from thee bulk move towards the surface to balance that charge. Thus if we draw a guassian surface, the net charge is zero hance no flux and no electric field but there is finite constant potential
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