The figure below shows a charge q surrounded by an isolated, metallic, spherical shell. The initial charge on the shell is Q. Once the configuration has reached electrostatic equilibrium, which of the following statements is/are true? (check all that apply)
If q is positive the charge on the inner surface A is positive
If q is negative the charge on the inner surface A is positive
The electric field in region I is zero if q and Q have equal magnitudes and opposite signs
The electric field in region I points toward q if it is negative and away from it if it positive, regardless of Q
The electric field in region II is zero only if q and Q have equal magnitudes and opposite signs
The electric field in region II is zero no matter what the values of q and Q are
The electric field in region III points toward the center of the shell if q is negative no matter what the charge Q is
The electric field in region III points away from the center of the shell if the sum q + Q is positive, and toward the center of the shell if the sum q + Q is negative
The charge on the outer surface B is always positive
The charge on the outer surface B is positive if the charge q is negative