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WorksheetsNetwork Theory
Total questions: 20
Worksheet time: 18mins
What is the transfer impedance of the two-port network shown in Fig. 1?
1 Ω
2 Ω
3 Ω
A two-port network is simply a network inside a black box, and the network has only
two terminals
two pairs of accessible terminals
two pars of ports
A two-port network is defined by the relations I1=2V1+V2 , I2=2V1+3V2 . Then Z12 is
-2 Ω
-1 Ω
−21Ω
−41Ω
For the single element two-port network in Fig, z11 is
0
5
10
20
For the single element two-port network in Fig, z11 is
undefined
5
10
20
When port 1 of a two-port circuit is short-circuited,
I1 = 4I2 and V2 = 0.25I2. Which of the following
is true?
y11=4
y12=16
y21=16
y22=0.25
If z-parameters are z11 = 40, z22 = 50 and z12 = z21 = 20, what would be the value of y22 in the matrix form of y-parameters given below?
1604
1605
16010
16015
How is the short circuit reverse transfer admittance (y12) calculated in terms of current and voltage ratio?
V2/ I1 (keeping I2 = 0)
I2/ V1 (keeping V2 = 0)
I1/ V2 (keeping V1 = 0)
V1/ I2 (keeping I1 = 0)
Find [Y]?
Find V1 and V2
-68.6 V, 114.3 V
68.6 V, -114.3 V
114.3 V, -68.6 V
-114.3 V, 68.6 V
The Z-parameters of the two-port network are Ω which of the following represents the equivalent T network?
Z1= Z2 = 1 Ω , Z3 = 1 Ω
Z1= Z2 = 2 Ω , Z3 = 2 Ω
Z1= Z2 = 2 Ω , Z3 = 1 Ω
Z1= Z2 = 0 , Z3 = 2 Ω
What is the transfer admittance of the network shown in Fig?
-2 S
-3 S
-4 S
-7S
If Z11 = 2 Ω ; Z12 = 1 Ω ; Z21 = 1 Ω and Z22 = 3 Ω, what is the determinant of admittance matrix.
5
1/5
1
0.5
If Z11 = 2 Ω ; Z12 = 1 Ω ; Z21 = 1 Ω and Z22 = 3 Ω, what is the determinant of admittance matrix?
-2 Ω
-1 Ω
−21Ω
−41Ω
For the T-network is shown Fig, the Ysc matrix is (units in Siemens)
The number of possible combinations generated by four variables taken two at a time in a two-port network is _____
four
two
six
three
Find Z22 of the following circuit.
5 Ω
3 Ω
2 Ω
4 Ω
Y parameters are also called as Short circuit admittance parameters
True
False
For a symmetrical two port network
Z11=Z22 and Y12=Y21
Y11=Y22 and Z12=Z21
Z11=Z22 and Y11=Y22
Z12=Z21 and Y12=Y21
Y11 =
ΔZz22
Δzz11
−Δzz22
−Δzz11
