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Automatic Control Systems

Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

True
False

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

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

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Automatic Control Systems
Magnetic amplifier is used for

Voltage amplification
Current amplification
Frequency amplification
Power amplification

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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

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

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

Zero
1
More than 1
less than 1

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

less than 1
more than 1
1
zero

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