Two identical neutral conducting spheres are in contact on insulating stands
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential
Problem
Two identical neutral conducting spheres are in contact on insulating stands. A negatively charged rod is brought close to one sphere without touching it. While the rod remains nearby, the two spheres are pulled apart and then the rod is removed. Which of the following best describes the net charge of the two–sphere system after all steps are completed?
(a) The net charge is positive because electrons were repelled from the spheres toward the negatively charged rod.
(b) The net charge cannot be determined without knowing the magnitude of the rod’s charge.
(c) The net charge is zero because no charge entered or left the system.
(d) The net charge is negative because electrons moved from the rod onto the spheres.