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Automatic Control Systems

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

Electrostatic energy
Charge
Voltage
Magnetic flux linkage

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Automatic Control Systems
Transport lag usually exists in

Thermal systems
Thermal, hydraulic and pneumatic systems
Hydraulic systems and thermal systems
Pneumatic systems

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Automatic Control Systems
Lag compensation permits a high gain at low frequencies.

True
False

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

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

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

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Automatic Control Systems
Which of the following is used to obtain output position in a position control system?

Synchro
Strain gauge
Load cell
Thermistor

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