(Q) an electric filed E0i exits in a region nd a sphere of radius r is kept along the eletric field. V represents the potential, then which is one is correct
1.\frac{\partial }{\partial x}V is constant inside the sphere and outside the sphere
2.\frac{\partial }{\partial x}V is constant inside the sphere but not outside the sphere
3.\frac{\partial }{\partial x}V is constant outside the sphere but not inside the sphere
4.\frac{\partial }{\partial x}V is not constant outside and inside the sphere
11U all knew it tht the V inside=0 henc ∂v/∂x=constant
But outside it is constant everywhere except just outside the sphere
bcoz the field lines are perpendicular to the sphere surface hence field is not constant in direction hence option b iz correct