- The breakaway point of the root locus from the real axis of a closed loop control system G(s)H(s) is (GATE 1995)
G(s)H(s) = lies
a) Between -2 and origin
b) Between -2 and -5
c) Between -10 and -infinity
d) At infinity
2) A unity feedback system has open loop transfer function G(s)H(s)= . Its root locus plot intersects the jw axis at
a)
b)
c)
d) Does not intersect the jw axis
3) A unity feedback system has open loop transfer function G(s)H(s)= . What is the maximum value of K for which the given open loop TF is stable enough?
a)
b) 6
c) 10
d) 6
4) The value of K for which the unity feedback system
=
crosses the imaginary axis is
a) 8
b) 16
c) 48
d)64
…….
** BODE PLOT QUESTIONS***
5) The Bode plot for the gain magnitude of a minimum phase system G(s) is shown in the figure. The transfer function G(s) is
a)
b)
c)
d)
6) For a transfer function . Maximum phase lead of the compensator is (GATE EE-2000)
a) 52 deg at 4 rad/s
b) 52 deg at 10 rad/s
c) 55 deg at 12 rad/s
d) None of the above.