# Control Systems [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 40 - 43 of 81

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## Question 40

Appeared in Year: *2017*

### Question

MCQ▾Which of the following can be the pole-zero configuration of a phase-lag controller (lag compensator) ?

### Choices

Choice (4) | Response | |
---|---|---|

a. | ||

b. | ||

c. | ||

d. |

## Question 41

Appeared in Year: *2017*

### Question

MCQ▾The Nyquist plot of the transfer function

does not encircle the point for but does not encircle the point for Then the closed loop system (having unity gain feedback) is

### Choices

Choice (4) | Response | |
---|---|---|

a. | Unstable for and unstable for | |

b. | Stable for and unstable for | |

c. | Unstable for and stable for | |

d. | Stable for and stable for |

## Question 42

Appeared in Year: *2015*

### Question

Numeric Answer▾Consider the bode plot shown in figure. Assume that all the poles and zeros are really valued.

The value of is …

## Question 43

Appeared in Year: *2017*

### Question

MCQ▾A unity feedback control system is characterized by the open loop transfer function

The Nyquist path and the corresponding Nyquist plot of are shown in the figures below.

Nyquist Path for

Nyquist plot of G (s)

If , then number of poles of the closed loop transfer function that lie in the right half of the s-plane is

### Choices

Choice (4) | Response | |
---|---|---|

a. | 0 | |

b. | ||

c. | 1 | |

d. | 3 |