| |
|
|
| |
 |
| Phasors |
|
Phasors are vectors, which rotate around an origin with a angular speed  They have the following properties. |
| |
| (i) Phasors rotate clockwise about the origin with angular speed equal to the angular frequency of current and voltage. |
| |
| (ii) The length of the phasors represent the amplitude of the alternating quantity |
| |
| (iii) The projection of each phasor on the vertical axis represents the value of alternating quantity at time 't'. |
| |
| (iv) Rotation angle: The rotation angle or each phasor is equal to the phase of the alternating quantity at time 't'. |
| |
| The phaser diagram therefore represents the phase relationship between AC and alternating EMF. The maximum value of E and I are represented by arrows called 'phasers'. In the above circuit, the phaser diagram would be |
| |
 |
| |
| A Phasor diagram representing current and potential difference across a resistance in an ac circuit is shown as above in the figure. |
| |
|
|
| |
|
|
| |
|
|
|
|
|
