# Control Systems [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 66 - 70 of 81

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## Question 66

Appeared in Year: *2016*

### Question

Numeric Answer▾The asymptotic Bode phase plot of , with k and both positive, is shown below.

The value of is …

## Question 67

Appeared in Year: *2017*

### Question

MCQ▾A second order LTI system is described by the following state equation.

When and are the two state variables and denote the input. The output . The system is

### Choices

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

a. | Critically Damped | |

b. | Under Damped | |

c. | Over Damped | |

d. | Undamped (oscillatory) |

## Question 68

Appeared in Year: *2017*

### Question

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

The value of k for which the system oscillates at is …

## Question 69

Appeared in Year: *2017*

### Question

MCQ▾Which of the following statement is incorrect?

### Choices

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

a. | Lead compensator is used to reduce the settling time | |

b. | Lag compensator always stabilizes an unstable system | |

c. | Lead compensator may increase the order of a system | |

d. | Lag compensator is used to reduce the steady state error. |

## Question 70

Appeared in Year: *2015*

### Question

Numeric Answer▾The characteristics equation of an LTI system is given by . The number of roots that lie strictly in the left half of s-plane is …