| A | B |
|---|
| Ohm's Law | In a DC circuit, voltage is directly proportional to Current and inversely proportional to resistance |
| SWITCH | a device which can close or open a circuit. |
| POLES | the number of separate switching circuits in a switch. |
| RELAY | a switch operated not by a lever but by an electromagnet. |
| FUSE | a wire deliberately designed to melt and break a circuit when current becomes excessive. |
| TOLERANCE | the degree to which a component's actual value may differ from its specified value. Usually stated as a percentage. |
| POTENTIOMETER | abbreviated pot, a variable resistor with three connections |
| SERIES CIRCUIT | a circuit where there is only one current path |
| CURRENT IN A SERIES CIRCUIT | Current measures the same everywhere in the circuit |
| VOLTAGE IN A SERIES CIRCUIT | divides among resistances |
| TOTAL RESISTANCE IN A SERIES CIRCUIT | equals the sum of the individual resistances |
| VOLTAGE DROP | the voltage that appears across each resistance |
| KIRCHOFF'S VOLTAGE LAW | the algebraic sum of all the voltages in a loop (including supply) is zero. |
| VOLTAGE DIVIDER | two or more resistors in series which divide the total voltage between them. The individual voltage drops are proportional to the individual resistances. |
