1. A glass rod is initially neutral. It is then rubbed against a silk cloth. Afterwards, the rod has a charge of +5.0 C
A) Did the electrons decrease or increase in the glass rod after it was rubbed?
B) How many electrons did the glass rod lose or gain?
2. An initially nuetral rubber rod was rubbed with fur, which caused it to gain 100,000 electrons. What is the charge in coulombs of the plastic rod?