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Automatic Control Systems

Automatic Control Systems
The effect of adding poles and zeros can be determined quickly by

Bode plot
Root locus
Nyquist plot
Nichols chart

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

more than 1
less than 1
zero
1

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Automatic Control Systems
In force current analogy, displacement x is analogous to

Electrostatic energy
Magnetic flux linkage
Voltage
Charge

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Automatic Control Systems
Which of the following can be used as a rotating amplifier in a control system? 1. Amplidyne 2. Separately excited dc generator 3. Synchro 4. Self excited dc generator

1 and 2
All
1, 2 and 3
3 and 4

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

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

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

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

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