Final answer:
The total charge on the outer surface of the large shell will be +5.0-µC, balancing the -5.0-µC on the inner surface to maintain electrical neutrality.
Step-by-step explanation:
The question relates to electrostatics in physics, specifically involving spherical conductors and their properties when charged. When a metallic sphere is charged and then surrounded by another metallic shell which is also charged, the properties of electrostatics tell us that the total charge on the outer surface of the large shell will be the sum of the charge placed on it and the charge induced by the inner sphere according to the principle of induction.
Considering the question indicating that a -5.0-µC charge is placed on the inside of the spherical shell, and the metallic sphere has a charge of +5.0-µC, these charges will induce an equal and opposite charge on the inner surface of the surrounding shell. However, as the shell is conductive and isolated, the outer surface must balance the inner induced charge to keep the shell electrically neutral. Therefore, the total charge on the outer surface of the shell will be +5.0-µC, which is a result of electrostatic shielding. The potential of the configuration can then be calculated using formulas for the potential of spherical conductors.