Electronics and Communication Engineering - Automatic Control Systems
Exercise : Automatic Control Systems - Section 3
- Automatic Control Systems - Section 1
- Automatic Control Systems - Section 2
- Automatic Control Systems - Section 3
- Automatic Control Systems - Section 4
- Automatic Control Systems - Section 5
- Automatic Control Systems - Section 6
- Automatic Control Systems - Section 7
- Automatic Control Systems - Section 8
- Automatic Control Systems - Section 9
- Automatic Control Systems - Section 10
46.
The polar plot of 

Answer: Option
Explanation:
It does not become real at any frequency.
47.
In a second order undamped system, the poles are on
Answer: Option
Explanation:
If poles are on imaginary axis the response is undamped and oscillatory.
48.
For the system of the given figure, the undamped natural frequency of closed loop poles is


Answer: Option
Explanation:
.
49.
An open loop system has a forward path transfer function (42.25)/s(s + 6.5). The unit step response of the system starting from rest will have its maximum value at a time equal to
Answer: Option
Explanation:
Unit step response is Taking inverse transform, the time domain response is - 1 + 6.5t + e-6-5t. It reaches maximum value at t = infinity.
50.
In the given figure 



Answer: Option
Explanation:
Use block diagram algebra.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers