Electrical Engineering: Control system MCQ

11. Question

Given the following polynomial equation

s3+5.5s2+8.5s+3=0

the number of roots of the polynomial, which have real parts strictly less than −1, is ________ .




Answer
12. Question

Loop transfer function of a feedback system is G ( s ) H ( s ) = (s+3) s2(s-3). Take the Nyquist contour in the clockwise direction. Then, the Nyquist plot of G ( s ) H ( s ) encircles  -1 + j 0




Answer
13. Question

Consider a continuous-time system with input x(t) and output y (t) given by

y(t) = x(t) cos(t)

this system is 




Answer
14. Question

If C⁡is a circle |z| = 4 and f (z) = Z2/(Z2-3Z+2)2 , then  is




Answer
15. Question

The number of roots of the polynomial, s 7 + ⁡ s 6 + 7s 5 + 14s 4 + 31s 3 + 73s 2 + 25s + 200,⁡in the open left half of the complex plane is




Answer