Name: Charge an Electroscope
Category: Electricity and Magnetism
Subcategory: Electrostatics
Classes: PHYS 102/106, PHYS 309
Comments: Keeping one finger on the electroscope, bring a charged rod close. Remove first your finger and then the rod. If the rod is negatively charged, the center piece will swivel due to the deficit of electrons. If the rod is brought close again, the deflection will go away.