Charge is uniformly distributed around a ring of radius r and the resulting electric field magnitude e is measured along the ring's central axis (perpendicular to the plane of the ring). at what distance from the ring's center is e maximum? (use any variable or symbol stated above as necessary.)

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward