A neutral conducting ball is suspended by an insulating thread
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential
Problem
A neutral conducting ball is suspended by an insulating thread. The following sequence is carried out:
(a) The ball is positively charged because electrons were pushed down into Earth while the positive rod was nearby.
(b) The ball is negatively charged because protons were repelled into Earth during the grounding step.
(c) The ball is negatively charged because electrons were drawn up from Earth while the positive rod was nearby.
(d) The ball is neutral because any induced charges returned to their original positions once the rod was removed.