1. The problem statement, all variables and given/known data If a point charge is inside a Gaussian sphere but is off center, why is its electric field still Qenc/(e0*4*pi*r^2)? 2. Relevant equations surface integral of E*da=Qenc/e0 3. The attempt at a solution If we draw cones out from the charge. the 2 surfaces from the cones' intersection has a charge/area. The bottom of the cone (circle) has areas A1 and A2. The slant of each cone is r1 and r2. Then, the teacher said (charge density)(A1/r1^2)=(charge density)(A2/r2^2). I don't know how he jumped to this. He said this proves that the electric field is still the above.