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Automatic Control Systems
Which of the following features is not associated with Nichols chart?
(0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
It is symmetric about -180°
M loci are centred about (0 dB, -180°) point
The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system
(0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
It is symmetric about -180°
M loci are centred about (0 dB, -180°) point
The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system
Answer
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Related Question
Automatic Control Systems
Lag compensation permits a high gain at low frequencies.
True
False
True
False
Answer
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Automatic Control Systems
For any transfer function, the constant phase angle loci are
A family of straight lines
Neither (a) nor (b)
A family of circles
Either (a) or (b)
A family of straight lines
Neither (a) nor (b)
A family of circles
Either (a) or (b)
Answer
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Automatic Control Systems
Temperature is analogous to
Flux
Charge
Voltage
None of these
Flux
Charge
Voltage
None of these
Answer
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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
3 and 4
1, 2 and 3
All
1 and 2
3 and 4
1, 2 and 3
All
Answer
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Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on
Either (a) or (b)
Stator
Partly on stator and partly on rotor
Rotor
Either (a) or (b)
Stator
Partly on stator and partly on rotor
Rotor
Answer
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