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Control Systems

Control Systems
Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?

 3.
 2.
 1.
 0.

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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 DC gain of a system represented by the transfer function 12 / {( s + 2 )( s + 3 )} is

 2.
 10.
 5.
 1.

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Control Systems
Time response for a second order control system depends on value of ξ. If ξ>1 then the system is called as

 critically damped system.
 undamped system .
 under damped system.
 over damped system.

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Control Systems
The unit step error coefficient of a system with unity feedback is

 0.
 1/6.
 1.
 infinity.

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Control Systems
A ramp input applied to an unity feedback system results in 5% steady state error. The type number of the system is...........?

 5
 2
 3
 1

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