As electric field remains the zero inside the conductor so the potential at the surface should be the same as inside, but i came with a situation which is as follows: if a spherical conductor is placed inside (concentrically) a conducting shell which has greater dimensions than that of the first conductor and a some charge is given to the smaller conductor
then no work should be done as the potential remains the same
however if we weld a metal conductor conducting the two spheres, then we notice that the entire charge Q must be appear on the outer sphere by Gauss's law. I'm not able to understand the two above contradicting statements.
Thanks.