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Automatic Control Systems

Automatic Control Systems
Lag compensation permits a high gain at low frequencies.

False
True

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Automatic Control Systems
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

False
True

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Automatic Control Systems
The distance of poles from origin depends on

Both A and B
Uqndamped natural frequency
Neither A nor B
Damping ratio

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Automatic Control Systems
The addition of a pole to the open loop transfer function pulls the root locus

To the right
To the left and making the system more stable
None of these
Towards right or left depending on the position of new pole

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Automatic Control Systems
The relative stability of a system is given by

Either (a) or (b)
Both phase and gain margins
Phase margin alone
Gain margin alone

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

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

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