Electrical Engineering (EE) > Topicwise Question Bank for Electrical Engineering > Test: Z-Transform- 2

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Test: Z-Transform- 2 - Question 4

The z-transform of discrete time signal x[n] = {1, 0, -1,0, 1,-1} is

Test: Z-Transform- 2 - Question 5

A all pass causal LTI system is described by the difference equation:

y[n] - ay[n - 1] = bx[n] + x [n - 1]

The value of ’b’ will be

Test: Z-Transform- 2 - Question 6

Consider a discrete time signal x(n) having z-transform given by if x(n) is right sided then z-transform x(z) belongs to

Test: Z-Transform- 2 - Question 9

The sequence x[n] corresponding tox (z) defined as will have the value at n = - 2

Test: Z-Transform- 2 - Question 10

The direct.form-II realisation of []R filter is shown below.

The transfer function is

Test: Z-Transform- 2 - Question 11

A sequence of x(n) with the z-transform x(z) = z^{4} + z^{2} - 2z + 2 - 3z^{-4} is applied as an input to a L.T.I system with the impulse response where, the output at n = 2 is

Test: Z-Transform- 2 - Question 13

Match List-I {x(n)} with List-II {x(z)} and select the correct answer using the codes given below the lists:

List-I

A. ∝^{n} u(n)

B. ∝^{n} u(-n -1)

C. ∝^{n} u(-n-1)

D. ∝^{n }u(n)

List-II

1.

2.

3.

4.

Codes

Test: Z-Transform- 2 - Question 14

Choose the correct option for given causal systems, stable or not

i.

ii.

iii.

Test: Z-Transform- 2 - Question 16

Consider discrete time signal x(n) is given by

x(n) = 4^{n} u(n)

Also,

Consider another signal

Also, y(z) = x^{2}(z)

then, y(n) is

Test: Z-Transform- 2 - Question 17

Consider a z-transform of a signal x(n)

value of x(1) is equal to

Test: Z-Transform- 2 - Question 18

Consider a discrete time signal x(n), who use z-transform x(z) is given by,

value of x(n) for n = 0 is

Test: Z-Transform- 2 - Question 19

If z-transform is given by x(z) = cos(z^{-3}), |z| > 0 the value of x[12] is

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