A uniformly charged insulating rod of length 15.0 cm is bent into the shape of a semicircle as shown in the figure below. The rod has a total charge of −7.50 µC. (a)
Find the magnitude of the electric field (in N/C) at O, the center of the semicircle.
N/C
(b)
Find the direction of the electric field at O, the center of the semicircle.
(c)
What if? What would be the magnitude of the electric field (in N/C) at O if the top half of the semicircle carried a total charge of −7.50 µC and the bottom half, insulated from the top half, carried a total charge of +7.50 µC?
N/C
(d)
What would be the direction of the electric field at O if the top half of the semicircle carried a total charge of −7.50 µC and the bottom half, insulated from the top half, carried a total charge of +7.50 µC?