Question 1

What is phasor?

Accepted Answer

Phasor is the representation of a sinusoidal waveform at any instant of time. Phasor is a rotating vector that has both magnitude and direction. It is represented by means of a straight line with an arrow at one end, where the straight line represents the magnitude and the arrow represents the direction.

Question 2

What is Phasor Diagram?

Accepted Answer

Phasor Diagram is a graphical representation of the relation between two or more alternating quantities in terms of magnitude and direction. It depicts the phase relationship between the sinusoidal waveforms having the same frequency.

Question 3

How to draw a phasor diagram?

Accepted Answer

Choose a phasor as a reference and draw it along the horizontal axis. At that instant, draw the other phasors one after another from the origin point. The phasor drawn behind the reference phasor is said to have a lagging phase difference. Similarly, the phasor that is drawn ahead of the reference phasor is said to have the leading phase difference.

Question 4

Why phasor diagram is used?

Accepted Answer

The phasor diagram is used to provide a graphical representation of the steady-state relationship between sinusoidal quantities that vary with respect to time. All the phasors rotate in an anticlockwise direction at a constant speed and complete one revolution per cycle.

Author: Abragam Siyon Sing

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