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Control Systems

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

 0
 2
 1
 4

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Control Systems
A second order control system has a transfer function 16/(s² + 4s + 16). What is the time for the first overshoot?

 π/4√3 sec
 π/2√3 sec
 π/√3 sec
 2π/√3 sec

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Control Systems
A function y (t) satisfies the following differential equation : Where, δ (t) is the delta function. Assuming zero initial condition and denoting the unit step function by u(t), y(t) can be formed as

 e-tu(t).
 et.
 etu(t).
 e-t.

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

 0.
 1/6.
 infinity.
 1.

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Control Systems
Consider a network function H(s) = 2(s+3)/{(s+2)(s+4)}. What is the steady state response due to step input?

 1/2
 4/3
 3/4
 1

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Control Systems
A proportional plus integral controller

 increases the stability of the system
 both 2 and 3
 it increases rise time
 has high sensitivity

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