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`        how we use phasar to solve question`
6 years ago

SAGAR SINGH - IIT DELHI
879 Points
```										Dear student,
A phasor diagram helps us to display the phase difference in a circuit that     contains passive components.
From the origin (arbitrarily defined) we draw     radial lines the length of which represents the magnitude of the variable.     The angles between these lines represents the phase difference, i.e. if two     lines have zero degrees between them then they are in phase, if they have 90     degrees between them they are out of phase by 90 degrees.
There is usually a reference phase angle that is represented by the     conventional x-axis. Advancing phase is then conventionally shown in an     anti-clockwise direction.
In text books a phasor quantity is usually represented as bold type i.e.     V but when one writes a phasor quantity underlined i.e. V. A     phasor that is at angle A to the reference angle is usually denoted     as V<A where A may be +ve or -ve (leading or lagging     respectively) to the reference.
The diagram below shows two phasors A and B. These are then     combined to give a new phasor C.

In this case the magnitude of C will be given by (by Pythagoras'     theorem):

and the phase difference between the reference angle (in this case phasor     A) and C is given by:

All the best.
Win exciting gifts by                                             answering the questions on          Discussion        Forum.    So      help         discuss     any                query   on        askiitians  forum   and      become an       Elite            Expert    League            askiitian.

Sagar Singh
B.Tech, IIT Delhi
sagarsingh24.iitd@gmail.com

```
6 years ago
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