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Control Systems

Control Systems
The phase margin of a system having the loop transfer function G(s)H(s) = 2√3/s(s+1) is

 30°
 80°
 45°
 60°

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Control Systems
Transient response is improved in case of

 lead network.
 both A and B.
 lag network.
 none of these.

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Control Systems
Given a unity feedback system with G(s) = k/s(s+4), the value of k for damping ratio of 0.5 is

 16
 64
 1
 4

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Control Systems
Advantages of open loop control system is/are

 accurate.
All of these
 simple and economical.
 reliable.

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Control Systems
The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the initial value?

 3/5
 3/9
 0
 1/4

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Control Systems
Which one of the following is the response y(t) of a casual LTI system described by H(s) = (s+1)/(s²+2s+2) for a given input x(t) = e-t u(t)?

 e-t sint*u(t)
 e-t cost*u(t)
 e-t tant*u(t)
 e-t cott*u(t)

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