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Automatic Control Systems

Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

True
False

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Automatic Control Systems
If poles lie in first quadrant, damping ratio is

Zero
less than 1
1
More than 1

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Automatic Control Systems
M circles are symmetrical with respect to

Real and imaginary axis
M = 1 straight line and real axis
M = 1 straight line
M = 1 straight line and imaginary axis

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Automatic Control Systems
Nichols chart consists of

None of these
Magnitude and phase angle loci in log-magnitude versus phase diagram
Constant magnitude loci
Constant phase angle loci

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Automatic Control Systems
For any transfer function, the constant phase angle loci are

Neither (a) nor (b)
A family of straight lines
Either (a) or (b)
A family of circles

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

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