Hi, I am dealing with a problem in Electrostatics. 1. The problem statement, all variables and given/known data There is a sphere with a spherical cavity in it. The sphere itself does not have net charge, but inside the cavity, there is a point charge at the center of the cavity. What's the electric field inside the cavity? 2. Relevant equations Gauss' Law, E=Q/(4*Pi*epsilon0*r^2) 3. The attempt at a solution I assume the field is 0 because the induced charges on the cavity surface cancels the field of the point charge in it. Is this assumption correct?