# Control Systems [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 16 - 18 of 81

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## Question 16

Appeared in Year: 2018 (UGC-NET)

### Question

MCQ▾

Which of the following is not correct in respect of a phase-lead compensation network? (December)

### Choices

Choice (4)Response

a.

It increases gain at higher frequencies

b.

It is used when fast transient response is required

c.

It increases system bandwidth

d.

It is used when phase decreases rapidly near crossover frequency

## Question 17

Appeared in Year: 2016 (UGC-NET)

### Question

MCQ▾

(1) The gain crossover is a point on the plot at which the magnitude of is equal to 1.

(2) The gain crossover is a point on the plot at which the magnitude of is equal to 0.

(3) The gain crossover frequency, is the frequency of where

(4) The gain crossover frequency is the frequency of where

Which of the above statements are correct?

### Choices

Choice (4)Response

a.

(1) and (3)

b.

(3) and (4)

c.

(1) and (2)

d.

(2) and (3)

## Question 18

Control Systems

Appeared in Year: 2013 (UGC-NET)

### Question

Assertion-Reason▾

### Assertion(Ꭺ)

An LTI discrete system represented by the difference equation is unstable. (June)

### Reason(Ꭱ)

A system is unstable if the roots of the characteristic equation lie outside the unit circle.

### Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

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