| A | B |
|---|
| electrons, orbit nucleus | negative charge |
| protons, in nucleus | positive charge |
| neutrons, in nucleus | neutral (no) charge |
| nucleus | contains both protons & neutrons |
| electricity | the movement of electrons |
| method - friction | example - static or lightning |
| method - heat | example - thermocouple |
| method - light | example - solar cell (photovoltac) |
| method - pressure | example - microphone (piezoelectric) |
| method - chemical | example - cell or battery |
| method - magnetism & mechanical energy | example - generator |
| A.C. | alternating current (wall outlets) |
| D.C. | direct current (batteries) |
| concuctors | allow electrons to move |
| semi-conductors (resistors) | allow some electrons to move |
| non-conductors (insulators) | allow no electrons to move |
| series | wired in line, one electrical path |
| parallel | wired with path around each item - source & ground |
| what electricity is always looking for | the shortest easiest path to ground |
| volt | electrical pressure (like car wash) |
| amp | electrical current or volume (like a lake) |
| ohm | resistance (like friction to electrical flow) |
| watt | power or work done (like bulbs 60 w vs. 100 w) |
