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### ECE :: Automatic Control Systems

1. For the system in the given figure the characteristic equation is

2.  A. B. C. K(s + 1)(s + 3) = 0 D. s(s + 2) = 0

3. Mechanical impedance is the ratio of

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

5. For the system in the given figure. The transfer function C(s)/R(s) is

6.  A. G1 + G2 + 1 B. G1 G2 + 1 C. G1 G2 + G2 + 1 D. G1 G2 + G1 + 1

7. Whether a linear system is stable or unstable that it

8.  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)

9. For the system of the given figure the transfer function =

10.  A. B. C. D.

11. In the given figure shows pole-zero plot. If steady state gain is 2 the transfer function G(s) is

12.  A. B. C. D.

13. If a system is to follow arbitrary inputs accurately the bandwidth should be

14.  A. large B. small C. very small D. neither small nor large

15. For the system of the given figure, the damping ratio of closed loop poles is

16.  A. 1.5 B. 1 C. 0.5 D. 0.25

17. 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

18.  A. Both A and R are correct and R is correct explanation of A B. Both A and R are correct but R is not correct explanation of A C. A is correct but R is wrong D. R is correct but A is wrong

19. For a first order system having transfer function , the unit impulse response is

20.  A. e-t/T B. T e-t/T C. D. T2 e-t/T