Electrical Engineering: Control system MCQ

The range of K for which all the roots of the equation s³+ 3s² + 2s + K = 0 are in the left half of the complex s-plane is

Which of the following systems has maximum peak overshoot due to a unit step input?

The root locus of the feedback control system having the characteristic equation s² + 6Ks + 2s + 5 = 0 where K > 0, enters into the real axis at

For the given 2-port network, the value of transfer impedance z 21 in ohms is ________

The transfer function C(s) of a compensator is given below:

C(s) = (1+s/0.1)(1 + s/100 ) / (1+s)(1 + s/10 )

The frequency range in which the phase (lead) introduce by the compensator reaches the maximum is