PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential
Problem
When a plastic rod is rubbed with wool, the rod acquires a net negative charge. Which of the following statements is most consistent with the law of conservation of electric charge?
(a) Protons moved from the wool into the rod, producing the rod’s net negative charge.
(b) Electrons were transferred from the wool to the rod, leaving the wool with an equal positive charge.
(c) Negative charge was created on the rod while an equal amount of positive charge disappeared from both objects.
(d) Electrons were transferred from the rod to the wool, so both objects became charged equally and negatively.