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Metal sphere A is hung from the ceiling by a long, thin string and given a positive charge. An identical sphere B is suspended nearby with an identical string and given a negative charge that has the same magnitude as the charge on A. The two spheres are 50 mm apart when in equilibrium. If an identical sphere C carrying no surplus charge is placed between them, does the distance between A and B increase, decrease, or remain the same?

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Answer:

A decreases while B increases because the equilebrium only reacts to different sphers of this substance.

Explanation:

The distance between A and B remain the same if the sphere C is placed between A and B sphere.

It is because there is 50 mm distance between A and B as well as there is no charge on the sphere C. If the sphere C occupies more space than 50 mm then the distance between A and B is increases due to dragging of sphere C but if the sphere C is occupies less area then they cause no increase in the distance between sphere A and B so we can conclude that sphere C has no effect on the increase in distance between sphere A and B.

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