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Control Systems

Control Systems
The magnitude of a transfer function G(jω)H(jω) at gain cross over frequency is

 any of the above
 0
 1
 infinity

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Control Systems
The transfer function of a system given by The system is

 unstable.
 an under damped.
 an over damped.
 a critically damped.

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Control Systems
Find the stability for the following transfer function G(s) = 50/s(s+5) ?

 Unstable
 Critically stable
 Marginally stable
 Stable

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Control Systems
A unity feedback control system has forward loop transfer function as e-Ts/s(s+1). Its phase value will be zero at frequency ω1. Which of the following equations should be satisfied by ω1?

 ω1 = cot(Tω1)
 Tω1 = tan(ω1)
 ω1 = tan(Tω1)
 Tω1 = cot(ω1)

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

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Control Systems
Find the type of the system given by

 3.
 1.
 2.
 4.

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