Automatic Control Systems
In force current analogue, mechanical mobility is analogous to
Answer: A
No answer description available for this question.
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The polar plot of a transfer function passes through (-1, 0) point. The gain margin is
Answer: A
When polar plot passes through (-1, 0) the system is on limit of stability and gain margin is zero.
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The maximum shift which can be provided by a lead compensator with transfer function 
is
Answer: B
The maximum phase lead is given by 
In this case a = 1/3. Hence sin Φm = 
= 0.5 or Φm = 30°.
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The phase margin and damping ratio have no relation.
Answer: B
They are related.
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The sensor generally used in incremental optical encoder is
Answer: C
No answer description available for this question.
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When a unit step voltage drives a lag network the output
Answer: B
At t = 0 the capacitor behaves as a short-circuit and output voltage is 0. At t = ∞ capacitor behaves as an open-circuit and V0 = Vi.
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Mechanical impedance is the ratio of
Answer: A
In force voltage analogy force is analogous to voltage and velocity to current. Just as 
, force/velocity = mechanical impedance.
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A stepper motor is
Answer: D
When input pulses are applied, the motor moves in steps.
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Bellows converts
Answer: A
To measure pressure, it is convenient to convert pressure into displacement and then use a displacement transducer.
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Assertion (A): In root locus the breakaway and break in points either lie on real axis or occur in complex conjugate pairs.
Reason (R): All root locus asymptotes intersect on real axis.
Answer: B
No answer description available for this question.
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