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?

Mr. Dubey • 52.30K Points
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Q. 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

(D) 6.0205 db

Correct : Option (D)

Explanation:

 gain margin is calculated by taking inverse of the gain where the nyquist plot cuts the real axis.

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Q. 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?

Discusssion

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