In Routh's-Hurwitz criterion, if there are changes of signs in the elements of the first column, then the number of sign changes indicates
A. The number of roots with negative real parts
B. The number of roots with positive real parts
C. The number of pair of roots of opposite sign
D. The number of pair of roots of same sign
Answer: Option B
This Question Belongs to Electronics And Communications Engineering >> Control Systems
In root locus analysis the breakaway and break in points
A. lie on the real axis
B. Either lie on the real axis or occur in complex conjugate pairs
C. Always occur in complex conjugate pairs
D. None of the above
Which of the following features is not associated with Nichols chart?
A. (0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
B. It is symmetric about -180°
C. M loci are centred about (0 dB, -180°) point
D. The frequency at intersection of G (j$$\omega $$) locus and M = +3 dB locus gives bandwidth of closed loop system
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