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Control Systems

Control Systems
In force-current analogy, electrical analogous quantity for displacement (x) is

 voltage.
 capacitance.
 inductance.
 flux.

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Control Systems
For the polynomial , find the number of roots which lie on the right half of s-plane?

 4
 0
 2
 1

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Control Systems
The characteristic equation of a feedback control system is given by s³ + 5s² + (k + 6)s + k = 0. In the root loci diagram, the asymptotes of the root loci for large 'k' meet at a point in the s-plane whose coordinates are

 (-2,0)
 (1,0)
 (2,0)
 (-1,0)

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Control Systems
Find the stability for the following transfer function G(s) = 50/s(s+5) ?

 Critically stable
 Stable
 Marginally stable
 Unstable

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If gain k is increased to infinity, then damping ratio will tend to become

 infinite
 0.707
 zero
 unity

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Control Systems
The transfer function of a system is 10/(1 + S) when operated as a unity feedback system, the steady state error to a unit step input will be

 10.
 1/11.
 ¾.
 Zero.

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