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Control Systems

Control Systems
The value of gain margin of the system having G ( s )H ( s ) = 8 / ( s + 2 )3 is

 6.
  8.
 2.
 4.

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Control Systems
When compared to a 1st order LPF, a 2nd order LPF has

 higher cut off frequency.
 faster drop in filter response.
 lower voltage gain.
 higher voltage gain.

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Control Systems
When writing a transfer function which of the following loops are not valid loops?

 Self loops at output node.
 Self loops at input node.
 Both 1 and 2.
 Neither 1 nor 2.

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Control Systems
By using which of the following elements, mechanical translational systems are obtained?

 dash-pot
 spring element
 mass element
All of these

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

 e6t.
 (1/6)*(1-e-6t).
 e-3t u(t).
 non of above.

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Control Systems
The second order system defined by 25/(s2 + 5s + 25) is given a step input. The time taken for the output to settle with in 2 % of input is

 0.4 sec.
 1.6 sec.
 2 sec.
 1.2 sec.

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