Multiples Mcqs which is bother me can't find answers on internet. Some help required.
Note: this is not homework or related to any test. Thanks

1.Z transform always lies around ?
a) origin b) pole c) zero d) z=1.

2.if z transform lies in ROC then.
a)system is stable b)inverse of system is stable c)both system and its inverse are stable.

3.Frequency in the control system represents? Continuous system in time domain ? In frequency domain?


3.If ROC does not lies inside unit circle,then ?
a) Fourier transform converges
b) Z transform converges
c) Hatly transform converges
d) Colpit Transform converges.


4.ROC converges if pole and zero lies inside
a) origin b) z=1 c) pole d) zero ? Explanation please?

if ROC does not converges then?

5.Z transform is use when system is not
a) converges b) diverges ?

6.Natural frequency of a system gives...
1) nature of transient 2) overshoot 3) oscillations 4) speed of response

7.What will be the sampling frequency that reveals the same sampled signal?

8.The control system is used for?

9. Transfer function is == ?
a. Mathematical model b. System with no physical structure c. Can be calculated through differential equations

10.Pole of s-plane gives the information about?

What do YOU think ?
While we're happy to HELP we wont do all the work for you.
Show us what you have done and where you are having problems..

In mathematics and signal processing, the Z-transform converts a discrete-time signal, which is a sequence of real or complex numbers, into a complex frequency domain representation.

Frequency in the control system represents? Continuous system in time domain ? In frequency domain?
so answer is friquency domain ? Right


If you need stability then the ROC must contain the unit circle. If you need a causal system then the ROC must contain infinity and the system function will be a right-sided sequence. If you need an anticausal system then the ROC must contain the origin and the system function will be a left-sided sequence. If you need both, stability and causality, all the poles of the system function must be inside the unit circle wikipedia

2.if z transform lies in ROC then.
a)system is stable b)inverse of system is stable c)both system and its inverse are stable.

and

3.If ROC does not lies inside unit circle,then ?
a) Fourier transform converges
b) Z transform converges
c) Hatly transform converges
d) Colpit Transform converges.


if ROC does not converges then?

5.Z transform is use when system is not
a) converges b) diverges ?

but I cant decide the right answers ?