Automatic Control Systems
In root locus analysis the breakaway and break in points

Either lie on the real axis or occur in complex conjugate pairs
lie on the real axis
Always occur in complex conjugate pairs
None of these

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Automatic Control Systems
Which of the following features is not associated with Nichols chart?

M loci are centred about (0 dB, -180°) point
(0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
It is symmetric about -180°
The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system

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