Electrical Engg (EEE) - MCQ Practice Questions

For a system with open-loop transfer function G(s)H(s) = K/[s(s+1)(s+2)], the number of asymptotes in root locus is:

A proportional-integral (PI) controller transfer function is Gc(s) = Kp + Ki/s. Its effect is:

The centroid of asymptotes in root locus is located at:

In phase-lead compensation, the zero is placed:

For a second-order system with natural frequency ωn = 5 rad/s and ζ = 0.7, the peak time tp is approximately:

A negative feedback system's loop gain L(s) = G(s)H(s) has a pole-zero excess of 2. What can be concluded?

A feedback system's sensitivity function S(s) = 1/(1+L(s)) where L(s) is loop gain. For large |L(s)|, what happens to |S(s)|?

For a system to be controllable using state feedback u = -Kx, which condition must be satisfied?

For improving transient response with minimal steady-state error impact, a lead compensator should be designed to add phase lead at:

For the characteristic equation s⁴ + 8s³ + 24s² + 32s + 15 = 0, using Routh-Hurwitz criterion, the system is:

In a root locus plot, the asymptotes for a system with 5 poles and 2 zeros meet at a point called:

For a system with Gc(s)G(s)H(s) = 100/[s(s+5)], the phase at ω = 5 rad/s is approximately:

The sensitivity function S(s) in a feedback control system is defined as:

In a Type-2 system with step, ramp, and parabolic inputs, the steady-state error with parabolic input A·t²/2 and loop gain Kv = 5 is: