# Electronics and Communication Engineering - Automatic Control Systems

## Why Electronics and Communication Engineering Automatic Control Systems?

In this section you can learn and practice Electronics and Communication Engineering Questions based on "Automatic Control Systems" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

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## Where can I get Electronics and Communication Engineering Automatic Control Systems Interview Questions and Answers (objective type, multiple choice)?

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## How to solve Electronics and Communication Engineering Automatic Control Systems problems?

You can easily solve all kind of Electronics and Communication Engineering questions based on Automatic Control Systems by practicing the objective type exercises given below, also get shortcut methods to solve Electronics and Communication Engineering Automatic Control Systems problems.

### Exercise :: Automatic Control Systems - Section 1

1.

For the system in the given figure the characteristic equation is A. B. C. K(s + 1)(s + 3) = 0 D. s(s + 2) = 0

Explanation:

Transfer function = .

Hence characteristic equation is .

2.

Mechanical impedance is the ratio of

 A. rms force to rms velocity B. rms force to rms displacement C. rms velocity to rms displacement D. none of the above

Explanation:

In force voltage analogy force is analogous to voltage and velocity to current. Just as , force/velocity = mechanical impedance.

3.

For the system in the given figure. The transfer function C(s)/R(s) is A. G1 + G2 + 1 B. G1 G2 + 1 C. G1 G2 + G2 + 1 D. G1 G2 + G1 + 1

Explanation:

Transfer function = (G1 + 1) G2 + 1 = G1 G2 + G2 + 1.

4.

Whether a linear system is stable or unstable that it

 A. is a property of the system only B. depends on the input function only C. both (a) and (b) D. either (a) or (b)

Explanation:

Stability is a property of the system only.

5.

For the system of the given figure the transfer function = A. B. C. D.  , E0(s) = [I(s)][Z2(s)] or .