Problem: Consider three identical metal spheres, A, B, and C. Sphere A has a charge of -2μC; sphere B has a charge of -6μC; and sphere C has a charge of +4μC. Spheres A and B are touched together and then separated. Spheres B and C are then touched and separated. Does sphere C end up with an excess or a deficiency of electrons and how many electrons is it? A) deficiency, 6x1013 B) excess, 3x1013 C) excess, 2x1013 D) deficiency, 3x1012 E) There is no imbalance of electrons.

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Problem Details

Consider three identical metal spheres, A, B, and C. Sphere A has a charge of -2μC; sphere B has a charge of -6μC; and sphere C has a charge of +4μC. Spheres A and B are touched together and then separated. Spheres B and C are then touched and separated. Does sphere C end up with an excess or a deficiency of electrons and how many electrons is it?

A) deficiency, 6x1013

B) excess, 3x1013

C) excess, 2x1013

D) deficiency, 3x1012

E) There is no imbalance of electrons.

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Based on our data, we think this problem is relevant for Professor Bhattacharya's class at UCF.