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If a Nyquist plot of G (jω) H (jω) for a closed loop system passes through (-2, j0) point in GH plane, what would be the value of gain margin of the system in dB?

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Question:

If a Nyquist plot of G (jω) H (jω) for a closed loop system passes through (-2, j0) point in GH plane, what would be the value of gain margin of the system in dB?

A.

0 db

B.

2.0201 db

C.

4 db

D.

6.0205 db

Answer» d. 6.0205 db

Note: The above multiple-choice question is for all general and Competitive Exams in India.