# Electronics and Communication Engineering - Automatic Control Systems

Exercise : Automatic Control Systems - Section 1
6.
In the given figure shows pole-zero plot. If steady state gain is 2 the transfer function G(s) is
Explanation:

The zero at - 1 gives the term (s + 1) in the numerator.

The poles at (- 2 + j1) and (- 2 - j1) give (s2 + 4s + 5) term is the denominator. Gain is 2.

7.
If a system is to follow arbitrary inputs accurately the bandwidth should be
large
small
very small
neither small nor large
Explanation:

Arbitrary inputs require large bandwidth.

8.
For the system of the given figure, the damping ratio of closed loop poles is
1.5
1
0.5
0.25
Explanation:

The standard form of characteristic equation is .

Therefore .

9.

Assertion (A): Potentiometers can not be used as error detectors in position control systems.

Reason (R): The resolution of a potentiometer places an upper limit on its accuracy

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
R is correct but A is wrong