| A | B |
| horsepower | a unit of power; equal to 746 Watts |
| kilowatt | a measurement equal to 1 000 watts or 1 000 joules per second |
| kilowatt-hour | indicates that a kilowatt of power has been used for one hour |
| Ohm's Law | describes the matematical relatioship present in most circuits |
| potentiometer | a variable resistor |
| power | the rate at which work is done |
| resistor | components that are used to control current in many circuits |
| watt | the metric, or SI, unit of power |
| Kirchoff's current law | states the current into a branch in a circuit equals the amount of current out of the branch |
| Kirchoff's voltage law | states that over an entire circuit, the energy taken out must equal the energy supplied by the battery |
| parallel circuit | a circuit in which the current can take more than one path |
| series circuit | a circuit in which the current only has one path |
| short circuit | a branch in a circuit with zero or very low resistance |