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Automatic Control Systems

Automatic Control Systems
In Bode plots the frequency at which two asymptotes meet is called corner frequency.

True
False

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Automatic Control Systems
In a simple on-off controller with differential gap, the magnitude of differential gap determines

The level of accuracy
Neither (a) nor (b)
The life of controller
Both (a) and (b)

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Automatic Control Systems
M circles are symmetrical with respect to

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

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

1
less than 1
zero
more than 1

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Automatic Control Systems
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

The gain is decreased below lower critical value
None of these
The gain is increased beyond upper critical value
Both A and B

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Automatic Control Systems
Magnetic amplifier is used for

Frequency amplification
Voltage amplification
Power amplification
Current amplification

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