| A | B |
|---|
| repel | like charges |
| attract | unlike charges |
| conductor | material that transfers charge easily |
| insulator | material that does not transfer charge easily |
| semiconductor | a third class of material characterized by properties between an insulator and a conductor |
| superconductor | become perfect conductors at or below a certain temp. |
| charging by contact | both insulators and conductors can become charged when they are rubbed together |
| induction | the process of charging a conductor by bringing it near another charged object and grounding the conductor |
| polarization | in the presence of a charged object the centers hift slightly resulting in a more positive charge on one side of the molecule than the other |
| Millikan | oil drop experiment |
