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2. A circular ring with a radius R of 1 cm carries a charge density of...

2. A circular ring with a radius R of 1 cm carries a charge density of ?L = R sin ? (? is an azimuthal angle) µC/cm. The ring is then placed on the xy plane with its axis the same as the z-axis. Find the electric field intensity E and the electric potential V on point A on z-axis 2 cm from the xy plane.

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