| A | B |
|---|
| Alternations | Two halves of a cycle |
| Cycle | Two complete alternations of current |
| Hertz | Cycles per second, frequency |
| Sine wave | Short for sinusoidal waveform |
| Amplitude | The max value of a sine wave measured from zero |
| Peak value | Absolute value of point on a waveform at the greatest amplitude |
| Peak-to-peak value | Vertical distance from one peak to another peak |
| Effective value | Value of AC current that will produce same amount of heat as DC current |
| RMS value | Another term for Effective value |
| Period | Time requried to complete one cycle of a sine wave |
| Frequency | Number of cycles that occur in a specific time period |
| Pulse width | The duration of the voltage at its max vlue until it drops to its minimum value |
| Fundamental frequency | The repitition rate of the waveform |
| Harmonics | Higher frequency sine waves that are exact multiples of the fundamental frequency |
| AC | Alternating Current |
| DC | Direct Current |
| AC Generator | Produces AC voltage by electromagnetic induction |
| AC electricity | The most commonly used form of electricity |
| AC current | Flows in one direction and then reverse flow in the other direction |
| f=1/t | The relationship between frequency and period |
