GATE 2022 : Control System Quiz 5

The root locus of a unity feedback system,  will intersect jω axis at s = ±j√α. The value of α is

Choose the correct statement for Root Locus:

1. Break away point is always negative.

2. Number of branches going to infinity = (P – Z).

Where, P is open loop poles and Z is open loop zeros.

The open loop transfer function of a unity negative feedback system is given by . Find the value of ‘K’ such that the phase margin is 60º.

The open loop transfer function of the system is . The root locus of the system consists of a circle. The radius of the circle is

The forward path transfer function of a unity feedback system is

The angle of departure from the complex pole s = (-1 + j) will be ________.

Break-in point for the Open loop Transfer function G(s)H(s) = is __________ if k > 0.