A student said, “The electric field inside a uniformly charged sphere is always zero.” Criticize this statement. A solid metal ball of radius 1.5 cm bearing a charge of −17 nC is located near a solid...

A student said, “The electric field inside a uniformly charged sphere is always zero.” Criticize this statement.

A solid metal ball of radius 1.5 cm bearing a charge of −17 nC is located near a solid plastic ball f radius 2 cm bearing a

uniformly distributed charge of +7 nC (Figure 16.62) on its outer surface. The distance between the centers of the balls is 9

cm.

(a) Show the approximate charge distribution in and on each ball.

(b) What is the electric field at the center of the metal ball due only to the charges on the plastic ball?

(c) What is the net electric field at the center of the metal ball?

(d) What is the electric field at the center of the metal ball due only to the charges on the surface of the metal ball?