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If the system is represented by G(s) H(s) = k (s+7) / s (s +3) (s + 2), what would be its magnitude at ω = ∞?(a) 0(b) ∞(c) 7/10(d) 21The question was asked at a job interview.This key question is from Nyquist Stability Criterion in section Stability in Frequency Domain of Control Systems

Answer»

Correct CHOICE is (a) 0

The best EXPLANATION: On calculating the magnitude of the SYSTEM and PUTTING the VALUE of frequency one gets the magnitude as 0.



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