The right end of a rod with length L and total charge Q is at a distance L to the surface of a spherical object with diameter L and total charge Q also, as shown in the figure. The axis of the rod and the center of the spherical object are collinear Determine the magnitude of the force exerted by the two objects on each other, and whether the force is attractive or repulsive for the following cases: A. Both the rod and the sphere are insulators, the charge Q is uniformly distributed on the rod and the surface of the sphere. B. The rod is an insulator while the sphere is a conductor. The charge Q is uniformly distributed on the rod. Use method of images

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The right end of a rod with length L and total charge Q is at a distance L to the surface of a
spherical object with diameter L and total charge Q also, as shown in the figure. The axis of
the rod and the center of the spherical object are collinear

Determine the magnitude of the force exerted by the two objects on each other, and whether
the force is attractive or repulsive for the following cases:
A. Both the rod and the sphere are insulators, the charge Q is uniformly distributed on
the rod and the surface of the sphere.
B. The rod is an insulator while the sphere is a conductor. The charge Q is uniformly
distributed on the rod. Use method of images

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