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Automatic Control Systems

Automatic Control Systems
In Bode plots the frequency at which two asymptotes meet is called corner frequency.

True
False

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Automatic Control Systems
In a simple on-off controller with differential gap, the magnitude of differential gap determines

Both (a) and (b)
The life of controller
The level of accuracy
Neither (a) nor (b)

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Automatic Control Systems
The poles with greater displacement from the real axis correspond to

Unbounded output
Lower frequencies of oscillations
Higher frequencies of oscillations
Stable response

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

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

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Automatic Control Systems
A system is highly oscillatory if

Gain margin is high
Gain margin is close to 1
Gain margin is high and phase margin is 180°
Gain margin is close to 1 or phase margin is zero

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

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

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