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Automatic Control Systems

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

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

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

Slotted armature
Surface wound armature
Either A or B
Surface wound with stationary rotor

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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
Neither (a) nor (b)
The level of accuracy

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Automatic Control Systems
M circles are symmetrical with respect to

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

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Automatic Control Systems
In force current analogue, mechanical mobility is analogous to

Admittance Y
Reactance X
Impedance Z
Conductance G

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Automatic Control Systems
In control systems the output of sensor usually, is

Analog electrical signal
Analog or digital electrical signal
Digital electrical signal
Mechanical signal

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