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Control Systems

Control Systems
The closed loop transfer function of a unity feedback control system is 9/(s² + 3s + 9), then the type of the system is

 2
 1
 0
 3

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

 10.
 5.
 1.
 2.

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Control Systems
A property of phase lead compensation is that the

 rise time of closed loop system is reduced.
 gain margin is reduced.
 bandwidth of closed loop system is reduced.
 overshoot is increased.

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Control Systems
The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is

 0.
 4.
 3.
 2.

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Control Systems
The transfer function of the system described by d²/dt²(y(t)) + 3d/dt(y(t)) + 2y(t) = 5u(t) with u(t) as input and y(t) as output is

 5/s(s²+3s+2)
 s(s²+3s+2)/5
 5/(s²+3s+2)
 (s²+3s+2)/5

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Control Systems
A linear time invariant system, initially at rest when subjected to a unit step input gave response c(t) = te-t (t ≥ 0). The transfer function of the system is

 s/(s+1)2
 1/s(s+1)2
 (s+1)2/s
 s/(s+1)

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