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....lovesatish

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.