| Alternating current (ac) |
– |
electrical current flowing first in one direction, then in another. |
| Alternator |
– |
an ac-producing device. |
| Ampere (Amp) |
– |
the unit of electrical current; the amount of current sent by one volt through a resistance of one Ω. |
| Conductor |
– |
any material through which electrical current moves easily. |
| Current |
– |
electron flow. (I) |
| Direct current (dc) |
– |
electrical current which flows in only one direction. |
| Electrical circuit |
– |
the complete path of an electrical current. |
| Electricity |
– |
the flow of electrons; current. |
| Electron |
– |
a negatively charged particle. |
| Emf |
– |
electromotive force; a pressure causing electron flow (expressed as voltage). |
| Frequency |
– |
the number of cycles per second. |
| Hertz (Hz) |
– |
unit of cycles per second. (Frequency) |
| Insulator |
– |
material through which electrical current does not flow easily. |
| Ohm |
– |
the unit of resistance (Ω) or (R). |
| Ohm's Law |
– |
the law of electricity which defines the relationship among voltage, resistance, and current. (E = IR) |
| Parallel circuit |
– |
multiple current paths. |
| Potential |
– |
an electrical force causing electron flow (expressed as voltage). |
| Power |
– |
rate at which energy is used. |
| Proton |
– |
a positively charged particle. |
| Resistance |
– |
any power consuming device. |
| Resistor |
– |
a device designed to limit current. |
| Series circuit |
– |
single current path. |
| Volt |
– |
the unit of voltage (V) or (E). |
| Voltage |
– |
an electrical potential causing electron flow; emf; potential. (E) |
| Watt |
– |
the unit of electrical power (P). |
