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Control Systems

Control Systems
The impulse response of the system described by the differential equation will be

 e-3t u(t).
 (1/3) × (1-e-3t).
 1/3.
 e6t.

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Control Systems
The characteristic equation of a control system is give by s(s + 4)(s² + 2s + 1) + k(s + 1) = 0. Find the angle between the asymptotes?

 360°
 180°
 60°
 120°

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Control Systems
If two blocks having gains A and B respectively are in parallel connection, find the resultant gain using block diagram reduction technique?

 A+B
 A/B
 2(A+B)
 A*B

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Control Systems
A unity feedback control system has an open loop transfer function G(s) = k/(s(s² + 7s + 12) The gain k for which s = -1 + j1 will lie on the root locus of the system is

 10
 4
 6.5
 5

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Control Systems
The impulse response of an initally relaxed linear system is e-2tu(t). To produce a response of te-2tu(t), the input must be equal to

 e-2tu(t).
 2e-tu(t).
 e-tu(t).
 (0.5)e-2tu(t).

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Control Systems
For a unity feedback control system open loop transfer function then velocity error constant is

 50.
 10.
 infinity.
 0.

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