# Electrical Engineering Objective Questions { Control System }

239.  The characteristic equation of a feedback system is s3 + Ks2 + Ss + 10 = 0. For the system to be critically stable, the value of K should be

240.  A linear second-order system with the transfer function G(s) = is S2 + 16s + 49 initially at rest and is subject to a step input signal. The response of the system will exhibit a peak overshool of

241.  As compared to a closed ioop system, an open loop system is

242.  Consider the following statements regarding time-domain analysis of a control system :1. Derivative control improves system's transient performance 2. Integral control does not improve system's steady state performance 3. Integral control can convert a second order system into a third order system Of these statements

243.  The principles of homogenity and super-position are applied to

244.  When a unit-step input is applied, a second order underdamped system has a peak overshoot of OP occurring at tmax. If another step input equal in magnitude to the peak overshoot OP is applied at t = tmax, then the system will settle down at

245.  Which one of the following statements are true of a type 1 system having unity gain in the forward path and a unity feedback? 1. Positional error constant K is equal to infinity. 2. Acceleration error constant Ka is equal to zero. 3. Steady-state error ess to a unit step displacement input is equal to one. Select the correct answer using the codes given below Codes :

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