2. Find the EF at distance z above the center of a square loop of side a that carries a uniform line charge ›.

The following questions refer to the configuration involving an electric dipole and an external charged particle depicted below:

In the diagrom shown, a charged object is toucheod to a metal sphere (Fig. A). Ocquires o negative charge (Fig. B), and the charge within the sphere quickly distributes itself uniformly throughout the sphere (Fig. C). 2. In this diogram, the sphere is charged via which of the following methods? A) Charging by Friction B) Charging by contact (conduction) C) Polarization D) Induction 3. The sphere in this diagram represents an example of a(n) - A) Insulator B) Semiconductor C) Conductor D) Superconductor