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Control Systems

Control Systems
What is the open loop DC gain of a unity feedback control system having closed loop transfer function as

 9/4
 13/4
 4/13
 4/9

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

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

 1
 2
 0
 4

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Control Systems
The open loop transfer function of non unity negative feedback system is , then the number of root locus branches equal to

 0.
 1.
 3.
 2.

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Control Systems
A lead compensator used for a closed loop controller has the following transfer function For such a lead compensator

 a < b.
 b < a.
 a < kb.
 a > kb.

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Control Systems
Transfer function of zero order hold response is

 (1 / s) × e-st.
 (1 / s) × (1 - e-st).
 (s) × (1 - est).
 (1 / s) × (1 - est).

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