Several charges in the neighborhood of point p produce an electric potential of 6.0 kv (relative to zero at infinity) and an electric field of 36i n/c at point p. determine the work required of an external agent to move a 3.0-μc charge along the x axis from infinity to point p without any net change in the kinetic energy of the particle.

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?