At what distance from a proton is the magnitude of its electric field 2.3×105 ?
What is the magnitude of the electric field at a point 0.65 away from a point charge of +7.0 ?
Two negative point charges are separated by 9.00and feel a mutual repulsive force of 1.75 . The charge of one is three times that of the other. A) How much charge does each have? B) What would be the force if the total charge were instead equally distributed on both point charges?