An initially uncharged hollow metallic sphere with radius of 6 cm has a small object with a charge of +19 µC carefully placed at the center of the sphere through a hole in the latter's surface.With the charge in place,what charge is now present on the outside surface of the sphere?

Question

An initially uncharged hollow metallic sphere with radius of 6 cm has a small object with a charge of +19 µC carefully placed at the center of the sphere through a hole in the latter's surface.With the charge in place,what charge is now present on the outside surface of the sphere?
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Quizplus · Accepted Answer

Since the metallic hollow sphere is conductive, the charges will redistribute themselves to achieve electrostatic equilibrium. Due to the presence of the small object with a positive charge (+19 µC), negative charges will move towards the surface of the sphere closest to the center of the sphere while positive charges will move to the outer surface of the sphere farthest away from the center of the sphere. Since there was no initial charge present in the sphere, the net charge on the sphere after the redistribution of charges will be +19 µC (equal to the charge of the small object). Therefore, the answer is choice D, +19 µC.

An Initially Uncharged Hollow Metallic Sphere with Radius of 6