By adding a pole at the origin of s -plane, the Nyquist plot of a system will rotate by

By adding a pole at the origin of s -plane, the Nyquist plot of a system will rotate by (a) 90° in anti -clockwise direction (b) 90° in clockwise direction (c) 180° in anti -clockwise direction (d) 180° in clockwise direction
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Answer :

By adding a pole at the origin of s -plane, the Nyquist plot of a system will rotate by 90° in clockwise direction

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