Hello: A thin nonconducting uniformly charged spherical shell of radius R has total positive charge of Q. A small circular plus is remoced from the surface. What are the magtnitude and direction of E at the center of the hole? So this shell has a hole now. Can I just treat this as a warped sheet and do E*dA = Q/2*epsilon? Then I can do E*dA = Q/2*epsilon. And then I will have E = Q/A*2*epsilon = Q/8*pi*R^2? Somehow this seems wrong to me. Thanks.