GATE EC 2022: Control Quiz 5

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Question 1

In the root locus plot shown in the figure, the pole/zero marks and the arrows have been removed. Which one of the following transfer functions has this root locus?

• A
• B
• C
• D

Question 2

Find out the point at which the root locus cuts the imaginary axis.

• A-6.35
• B-1.5j 
• C-2.8j
• D -2

Question 3

An unity feedback system is given as

Indicate the correct root locus diagram

• A
• B
• C
• D

Question 4

The root locus of the system has the break–away point located at

• A(–0.5, 0)
• B(–2.548, 0)
• C(–4, 0)
• D(–0.784, 0)

Question 5

For the open loop transfer function, determine the centroid of its root locus plot.

• A-3.5
• B-2.5
• C-3
• D-2

Question 6

A closed loop system has the characteristic function. Its root locus plot against K is

• A
• B
• C
• D

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