Which of the following statements is true about phasor representation of sinusoidal quantities?

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SSC JE Electrical 14 Nov 2022 Shift 3 Official Paper
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  1. Represent a sinusoidal quantity by a line of definite length rotating in the clockwise direction with different angular velocity.
  2. Represent a sinusoidal quantity by a line of definite length rotating in the counterclockwise direction with different angular velocity.
  3.  Represent a sinusoidal quantity by a line of definite length rotating in the counterclockwise direction with the same angular velocity as that of sinusoidal quantity.
  4. Represent a sinusoidal quantity by a line of definite length rotating in the clockwise direction with the same angular velocity as that of sinusoidal quantity.

Answer (Detailed Solution Below)

Option 3 :  Represent a sinusoidal quantity by a line of definite length rotating in the counterclockwise direction with the same angular velocity as that of sinusoidal quantity.
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Phasor representation of sinusoidal quantities

Phasor is used to represent a sinusoidal quantity by a line of definite length rotating in the counterclockwise direction with the same angular velocity as that of a sinusoidal quantity.

Comparison between two sinusoidal quantities is done on the basis of leading and lagging phasor.

On counter clock rotation from the reference phasor, the quantity which comes first is known as the leading phasor quantity.

On clock rotation from the reference phasor, the quantity which comes first is known as the lagging phasor quantity.

F3 Madhuri Engineering 08.11.2022 D17

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