a perfect conductor becomes ( or tends to become ) equipotential.....right ...but in a wire carrying current.( steady ) is said to have electric field inside....( we say so when deriving drift velocity ) ....but but along an electric field there is potential drop....but then how is a wire still equipotential...........i hope my query will be answered....

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satish

1.In electrostatics, steady state conditions exist. when conductor is charged, electric field inside it is zero. This is because the surface of the conductor is an equipotential surface.2.When a potential difference is applied across a conductor condition is no longer static. So, current begins to flow. An electric field exists inside the conductor.
Hence, when a steady current is flowing in a cylindrical conductor, electric field exists within the conductor.