PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential
Problem
A glass rod is rubbed with silk, leaving the rod positively charged. Which statement best describes the charge distribution on the rod immediately afterward?
(a) Positive and negative charges separate inside the rod, making one end positive and the other negative like a dipole.
(b) Positive charge remains localized near the rubbed region because glass is an insulator.
(c) Positive charge is uniformly spread over the rod’s surface because glass is a conductor.
(d) Electrons from the silk move onto the rod, so the rod carries excess negative charge along its length.