PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Two point charges, each of magnitude q, are 10cm apart. Initially both are +q. If one of them is changed to −q, how does the magnitude of the force between them change?
(a) It doubles and turns attractive
(b) It becomes half and turns attractive
(c) It remains the same but turns attractive
(d) It remains the same but remains repulsive