Prateek nas module 3 30-dec-15

1
NetworkAnalysisandSynthesis
By:
Prateek Saxena
Asst Professor
ECE Department
RVIT College, Bijnor
R.V. INSTITUTE OF TECHNOLOGY
Approved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow

2
MODULE-2
1. Networks theorm

3
QUESTION-1
Superposition theorem can be applied only to circuits having
a. resistive element
b. passive element
c. non-linear element
d. linear bilateral elements

4
Answer- D

5
QUESTION-2
If all the elements in a particular network are linear then the
superposition theorems holds when the excitation is
a. DC only
b. AC only
c. Either AC or DC
d. An impulse

6
Answer - C

7
QUESTION-3
Which of the following theorems is applicable for both linear
and non-linear circuits
a. Superposition
b. Thevenin
c. Norton
d. None of these

8
Answer - D

9
QUESTION-4
The concept on which superposition theorem is based
a. Reciprocity
b. duality
c. non-linearity
d. linearity

10
Answer- D

11
QUESTION-5
Thevenin’s theorem can be applied to calculate the current in
a. Any load
b. A passive load only
c. A linear load only
d. A bilateral load only

12
Answer- C

13
QUESTION-6
When determining Thevenin’s resistance of a circuit
(a) all sources must be open circuited
(b) all sources must be short circuited
(c) all voltage sources must be open circuited and all current
sources must be short circuited
(d) all sources must be replaced by their internal resistances

14
Answer-D

15
QUESTION-7
Which one of he following theorems is a manifestation of the
law of conservation of energy
a. Tellegen’s theorem
b. Reciprocity theorem
c. Thevenin’s theorem
d. Norton’ theorem

16
Answer- A

17
QUESTION-8
Tellegen’s theorem is applicable to
a. Circuit having passive element
b. Circuits having time –invariant elements only
c. Circuits with linear elements only
d. Circuits with active or passive, linear or non-linear
and time –in variantor time –varying elements

18
Answer-D

19
QUESTION-9
Millman’s theorem yields
a. Equivalents voltage source
b. Equivalent voltage or current source
c. Equivalent resistance
d. Equivalent impedance

20
Answer-B

21
QUESTION-10
When a source is delivering maximum power to a load ,the
efficiency of the circuit
a. Is always 50%
b. Depends on the circuit
parameter
c. Is always 75%
d. None of these

22
Answer - A

23
QUESTION-11
Maximum power transfer occurs at a
a. 100% efficiency
b. 50% efficiency
c. 25% efficiency
d. 75% efficiency

24
Answer- B

25
QUESTION-12
Thevenin’s resistance Rth is found
a. by removing voltage source along with their
internal resistance
b. by short circuiting the given two terminal
c. between any two open terminal
d. between same open terminal as for Vth

26
Answer -D

27
QUESTION-13
Any number of current sources in parallel may be replaced by a single
current source whose current is the algebric sum of individual source
currents and source resistance is the parallel combination of the
individual sources resistance. Above statement is associated with
a. thevenin’s theorm
b. millman’s theorm
c. maximum power transfer theorm
d. none of the above

28
Answer- B

29
in any linear bilateral network, if a source of emf E in
any branch produce a current I in any other branch then
same emf in the second branch would produce same
current in the first branch
(a) Compensation theorem
(b) Superposition theorem
(c) Reciprocity theorem
(d) None of the above
QUESTION-14

30
Answer- C

31
QUESTION-15
For high efficiency of transfer of power, internal resistance of the
source should be
a. Equal the load resistance
b. less than the load resistance
c. more than the load resistance
d. none of the above

32
Answer- B

33
QUESTION-16
for the maximum transfer of power, internal resistance of the source
should be
a. equal the load resistance
b. less than the load resistance
c. Greater than the load resistance
d. None of the above

34
Answer- A

35
QUESTION-17
In a series parallel circuit, any two resistance in the same
current path must be in
a. series with each other
b. parallel with each other
c. Series with voltage source
d. Parallel with voltage source

36
Answer- A

37
Applications of Norton’s theorm to a circuit yields
(a) Equivalent current source and impedance in series
(b) Equivalent current source and impedance in parallel
(c) Equivalent impedance
(d) Equivalent current source
QUESTION-18

Answer-A
38

QUESTION-19
The superposition theorem is applicable to
a) Voltage only
b) Current only
c) Both current and voltage
d) Current voltage and power
39

Answer-D
40

QUESTION-20
The superposition theorem requires as many circuits to be solved
as there are
a) sources, nodes and meshes
b) Sources and nodes
c) sources
d) node
41

Answer- C
42

43
QUESTION-21
What would be the potential at point a
a. 15v
b. 30v
c. 5v
d. 10v

44
Answer -A

45
QUESTION-22
If we double the voltage source in above equation the Va would be
as compared to previous one
a. same
b. double
c. 4 times
d. None of the above

46
Answer- B

QUESTION-23
In the following circuit the value of Vth and Rth are
a) 2V , 4Ω
b) 4V , 4Ω
c) 4V , 5Ω
d) 2V , 5Ω
47

Answer-B
48

QUESTION-24
The reciprocity theorem is applicable to
a) Circuit with one independent sources
b) Circuits with only one independent sources and
no dependent sources
c) Circuits with any number of independent sources
d) Circuit with any number of sources
49

Answer-B
50

QUESTION-25
The substitution theorem applies to
a) Linear networks
b) Non linear networks
c) Linear time –invariant network
d) Any network
51

Answer-D
52

QUESTION-26
If a network has all linear elements except for a few non-linear
ones the superposition theorem
a) Cannot hold at all
b) Always hold
c) May hold on careful selection of element
values,sources waveform and response
d) Holds in case direct current excitation
53

Answer- A
54

QUESTION-27
a) 12V , 3/2Ω
b) 4V , 3/2Ω
c) 16/3V , 2/3 Ω
d) 16/3V , 3 Ω
55
What is the Thevenin’s equivalent between A and B for the circuit
shown

Answer-C
56

QUESTION-28
If a resistance of 10Ω is placed in parallel with the source, the
source current I will
a) increase
b) decrease
c) Remain same
d) none
57

Answer- A
58

QUESTION-29
What is the power dissipated in the R due to current source
a) 6W
b) 5W
c) 4W
d) 2W
59

Answer-D
60

QUESTION-30
The maximum power that can be distributed in the load in circuit
a) 0.396W
b) 6W
c) 6.75W
d) 13.5W
61

Answer-A
62

QUESTION-31
Find Vx from the given circuit
a) 42.2V
b) 83.3V
c) 97.3V
d) 103V
63

Answer- B
64

Superposition theorem is not applicable for
a) Voltage calculations
b) Bilateral elements
c) Power calculation
d) Passive elements
QUESTION -32
65

ANSWER- C
66

QUESTION -33
Which of the following statement is true
a) A Norton’s equivalent is a series circuit
b) A Thevenin’s equivalent circuit is parallel circuit
c) R-L circuit is a dual pair
d) L-C circuit is dual pair
67

Answer-D
68

QUESTION -34
In any lumped network with elements in b branches ,
For all t ,holds good according to
a) Norton’s theorem
b) Thevenin’s theorem
c) Millman’s theorem
d) Tellegen’s theorem
69
1
( ). ( ) 0
b
k k
k
v t i t



Answer-D
70

QUESTION -35
Thevenin’s theorem can be applied to calculate the current in
a) Any load
b) a passive load only
c) A linear load only
d) A bilateral load only
71

Answer-A
72

QUESTION -36
The subsitution theorem is applicable for a network which has
a) Linear networks
b) Non linear networks
c) Linear time-invariant network
d) Any network
73

Answer-D
74

QUESTION -37
The subsituition theorem is applicable for a network which has
a) A unique solution
b) One or two non linear elements
c) One non linear or time varying element
Choose the correct combination
75
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 1 ,2 and 3

Answer-B
76

QUESTION -38
The reciprocity theorem is applicable to a network
i) Which contains R,L,C as element
ii) Which is initially a relaxed system
iii) Which has both dependent and independent sources
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 1,2 and 3 77

Answer-A
78

QUESTION -39
What are the fundamental rules for network analysis
a) Ohm’s law
b) Kirchoff ‘s law
c) Law of conservation of energy
d) Both a) and b)
79

Answer-D
80

QUESTION -40
Supermesh concept is only for
a) Current sources
b) Voltage sources
c) Dependent sources
d) None of the above
81

Answer-A
82

QUESTION -41
Ohm law mathematical statement given as
a) V=IR
b) V=I/R
c) R=V/I
d) None of the above
83

Answer-A
84

Ohms law not applicable to
QUESTION -42
a) Linear circuits
b) Non linear circuits
c) No limitation
85

Answer-B
86

QUESTION -43
KVL is …………… of nature of circuit element
a) dependent
b) independent
c) In other way
d) Time varying
87

Answer-B
88

QUESTION -44
If an impedance ZL is connected across a voltage source V with
source impedance ZS’ then for maximum power transfer, the load
impedance must be equal to
(a) source impedance ZS
(b) complex conjugate of ZS
(c) real part of ZS
(d) imaginary part of ZS
89

Answer-B
90

QUESTION -45
In a practical voltage source, the terminal voltage
(a) cannot be less than source voltage
(b) cannot be higher than source voltage
(c) is always less than source voltage
(d) is always equal to source voltage
91

Answer-
92

QUESTION -46
What are the limitation of Reciprocity theorem
a) Not applicable to a network consisting of any
dependent source if any linear
b) Not applicable to a network consisting of any time
varying element
c) Not applicable to a network consisting of non
linear element like diode,transistor etc
d) All of the above 93

Answer- D
94

QUESTION -47
What are the limitation of Thevenin’s theorem
a) Not applicable to the circuit consisting of
unilateral element like diode
b) Bilateral element
c) Linear elements
d) All of the above
95

Answer- A
96

QUESTION -48
What are the limitation of Norton’s theorem
a) Not applicable to the circuit consisting of load
series or parallel with controlled or dependent
sources
b) independent
c) In other way
d) Time varying
97

Answer- A
98

QUESTION -49
The V-I characteristic of a resistor is i=2v^2. The resistor is
a. Linear , passive, bilateral
b. Non-linear , passive , bilateral
c. Non-linear , active , bilateral
d. Non-linear , active ,unilateral
99

Answer- B
100

QUESTION -50
Which property of delta function indicates the equality between
the area under the product of function with shifted impulse and the
value of function located at unit impulse instant
a) Replication
b) Sampling
c) Scaling
d) Product
101

Answer- B
102

Thank you
&
All The Best

Prateek nas module 3 30-dec-15

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