How will the interaction forces of two small charged balls change if their charges are left the same in magnitude, but: a) the sign of one of the charges is changed to the opposite? b) change the sign of both charges to the opposite?
A) the forces of interaction of the balls will remain the same in modulus, but both will change direction: the attraction of the balls will be replaced by repulsion or vice versa
B) the forces of interaction will not change either in magnitude or in direction.
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