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Control Systems

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

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

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If gain k is increased to infinity, then damping ratio will tend to become

 unity
 infinite
 zero
 0.707

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

 4/13
 4/9
 9/4
 13/4

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Control Systems
Find the bandwidth of the system, when rise time of the system is give as 1msec?

 500 Hz
 350 Hz
 1 kHz
 750 Hz

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Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 2
 3
 4
 1

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Control Systems
Sparking between the contacts can be reduced by inserting

 a resistor in the line.
 a reactor in the line.
 a capacitor in series with the contacts.
  a capacitor in parallel with the contacts.

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