A solid metal ball of radius 1.3 cm bearing a charge of 6.2 nC is located near to and along the midline of a hollow uniformly charged plastic rod of radius 1.9 cm and length 12.5 m bearing a uniformly distributed charge of 7.1 nC (see the figure) on its outer surface. The distance between the center of the rod and the center of the ball is 25.5 cm. What is the electric field at the center of the metal ball due only to the charges on the sur- face of the metal ball? (The figure shows the rod edge on.) Give the x-component of the field only.

A solid metal ball of radius 1.3 cm bearing a charge of 6.2 nC is located near to and along the midline of a hollow uniformly charged plastic rod of radius 1.9 cm and length 12.5 m bearing a uniformly distributed charge of 7.1 nC (see the figure) on its outer surface. The distance between the center of the rod and the center of the ball is 25.5 cm. What is the electric field at the center of the metal ball due only to the charges on the sur- face of the metal ball? (The figure shows the rod edge on.) Give the x-component of the field only.