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Z Transforms

Authored by SUGANYA RAMASAMY

Mathematics

University

Used 131+ times

Z Transforms
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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Z transforms of unit step function is

zz-a\frac{\text{z}}{\text{z-a}}

zz-1\frac{\text{z}}{\text{z-1}}

1

0

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is damping rule?

Z{n(f(n))}=−zddF(z)Z\left\{n\left(f\left(n\right)\right)\right\}=-z\frac{\text{d}}{\text{d}}F\left(\text{}z\right)

Z{f(n−k)}=z−nF(z)Z\left\{f\left(n-k\right)\right\}=z^{-n}F\left(z\right)

Z{f(n+1)}=zF(z)−zf(0)Z\left\{f\left(n+1\right)\right\}=zF\left(z\right)-zf\left(0\right)

Z{anf(n)}=F(za)Z\left\{a^nf\left(n\right)\right\}=F\left(\frac{z}{a}\right)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 If Z{f(n)}=F(z) then f(0)=lim⁡z→∞F(z) is calledIf\ Z\left\{f\left(n\right)\right\}=F\left(z\right)\ then\ f\left(0\right)=\lim_{z\rightarrow\infty}F\left(z\right)\ is\ called  

 First shifting theoremFirst\ shifting\ theorem  

 Second shifting theoremSecond\ shifting\ theorem  

 Initial value theoremInitial\ value\ theorem  

 Final value theoremFinal\ value\ theorem  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The convolution theorem of Z- Transform is

Z−1{F(z)G(z)}=f(n)⋅g(n)Z^{-1}\left\{F\left(z\right)G\left(z\right)\right\}=f\left(n\right)\cdot g\left(n\right) Z−1{F(z)G(z)}=f(n)⋅g(n)Z^{-1}\left\{F\left(z\right)G\left(z\right)\right\}=f\left(n\right)\cdot g\left(n\right)

Z−1{F(z)+G(z)}=f(n)+g(n)Z^{-1}\left\{F\left(z\right)+G\left(z\right)\right\}=f\left(n\right)+g\left(n\right)

Z−1{F(z)−G(z)}=f(n)−g(n)Z^{-1}\left\{F\left(z\right)-G\left(z\right)\right\}=f\left(n\right)-g\left(n\right)

Z−1{(F(z)G(z))}=f(n)g(n)Z^{-1}\left\{\left(\frac{F\left(z\right)}{G\left(z\right)}\right)\right\}=\frac{f\left(n\right)}{g\left(n\right)}

5.

FILL IN THE BLANKS QUESTION

1 min • 1 pt

What are the types used to solve inverse Z Transform

(a)  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 Z[1n]=Z\left[\frac{1}{n}\right]=  

 log⁡(1z−1)\log\left(\frac{1}{z-1}\right)  

 log⁡(zz−1)\log\left(\frac{z}{z-1}\right)  

 log⁡ (1z+1)\log\ \left(\frac{1}{z+1}\right)  

 log⁡(z−1)\log\left(z-1\right)  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 Z{δ(n−3)}=Z\left\{\delta\left(n-3\right)\right\}=  

 1z\frac{1}{z}   1z\frac{1}{z} 

 1z2\frac{1}{z^2}  

 1z3\frac{1}{z^3}  

 1zk\frac{1}{z^k}  

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