Q:

The impulse response of a discrete time system is the inverse Z-transform of the transfer function of the system in z-domain.

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: The Z-transform of the impulse response of discrete time system gives the transfer function of the system in z-domain. This can also be achieved from the impulse invariance transformation. Hence, the converse should be true and the above statement is true.

View Answer Discuss

Category: Electronics & Electrical MCQs
Sub Category: MATLAB Mcqs

5
Q:

The convolution of a signal in time domain can be viewed as __________

A) Multiplication in z-domain B) Squaring in z-domain
C) Doubling the signal in z-domain D) Convolution in z-domain
 
Answer & Explanation Answer: A) Multiplication in z-domain

Explanation: Not available for this question

View Answer Discuss

Category: Electronics & Electrical MCQs
Sub Category: MATLAB Mcqs

5
Q:

The Z-transform doesn’t follow the linearity principle.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: The Z-transform does follow the principles of homogeneity and superposition. Hence, the linearity principle can be applied to check if a system is linear or not in the z-domain.

View Answer Discuss

Category: Electronics & Electrical MCQs
Sub Category: MATLAB Mcqs

5
Q:

The Z-transform is only for discrete signals.

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: The signal needs to be a sampled sequence so that it can be represented in terms of the complex frequency z. Hence, the above statement is true.

View Answer Discuss

Category: Electronics & Electrical MCQs
Sub Category: MATLAB Mcqs

4
Q:

If σ<0, the point in the z plane lies __ of the circle |z|=1.

A) Interior B) Exterior
C) On the circumference D) Nowhere near
 
Answer & Explanation Answer: A) Interior

Explanation: For σ<0, |z| is less than 1. Hence, the point lies interior to the circle |z|=1.

View Answer Discuss

Category: Electronics & Electrical MCQs
Sub Category: MATLAB Mcqs

4
Q:

The R.O.C. of a unit step function is __________

A) |z|>|1| B) Entire z plane except z=0
C) Entire z plane except z=∞ D) Does not exist
 
Answer & Explanation Answer: A) |z|>|1|

Explanation: Not available for this question

View Answer Discuss

Category: Electronics & Electrical MCQs
Sub Category: MATLAB Mcqs

6
Q:

The bilateral Z-transform ranges from ____________

A) -∞ to ∞ B) 0 to ∞
C) -∞ to 0 D) Does not exist
 
Answer & Explanation Answer: A) -∞ to ∞

Explanation: Unilateral Z-Transform ranges are provided in 0 to ∞ and -∞ to 0. For Bilateral Z-transform the signal can be defined in the range given in option -∞ to ∞.

View Answer Discuss

Category: Electronics & Electrical MCQs
Sub Category: MATLAB Mcqs

3
Q:

The R.O.C. of impulse function is _________

A) The entire z-plane B) Interior to the unit circle |z|=1
C) Exterior to the unit circle |z|=1 D) Between the unit circle |z|=1 and |z|=∞
 
Answer & Explanation Answer: A) The entire z-plane

Explanation: The impulse function has a Z-transform equal to 1.Since it is independent of z, it exists for all values of z. Hence, the Z-transform converges for all values of z. Thus, the R.O.C. of impulse function is the entire z-plane.

View Answer Discuss

Category: Electronics & Electrical MCQs
Sub Category: MATLAB Mcqs

5