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Automatic Control Systems

Automatic Control Systems
The distance of poles from origin depends on

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

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Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on

Partly on stator and partly on rotor
Either (a) or (b)
Rotor
Stator

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Automatic Control Systems
Nyquist stability criterion uses open loop frequency response characteristics.

False
True

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

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

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Automatic Control Systems
The sensor generally used in incremental optical encoder is

LCD
Either (a) or (b)
Photodiode
LED

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Automatic Control Systems
A lead compensator

Speeds up the transient response
Increases the stability margin and speeds up the transient-response.
Increases the stability margin
None of these

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