1/11
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER 2(C2D) • EXAMINATION SUMMER 2018
Subject Code: C321102 Date: 01-Jun-2018
Subject Name: ELECTRONIC NETWORKS
Time:02:30 PM TO 04:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumption wherever necessary.
3. Each question is of 1 mark.
4. Use of SIMPLE CALCULATOR is permissible. (Scientific/Higher Version not allowed)
5. English version is authentic.
No.
Question Text and Option.
1.
If one of the resistors in parallel circuit, Is removed, what happens to the total resistance
A.
Decrease
B.
Increase
C.
Remain constant
D.
Exactly doubles


A.

B.

C.

D.

2
Which of the following is a unilateral element
A.
Resistor
B.
Inductor
C.
Silicon diode
D.
None of these


A.

B.

C.

D.

3.
If the voltage across a given capacitor is increased, does the amount of stored charge.
A.
Increase
B.
decrease
C.
Remain constant
D.
Exactly doubles


A.

B.

C.

D.

4.
If a resistor has 5.5 volt across it and 5mA flowing through it, what is the power?
A.
16.5mW
B.
15mW
C.
1.83mW
D.
16.5W

mA
A.
mW
B.
mW
C.
mW
D.
W
5.
Identify the passive element of the following
A.
Voltage Source
B.
Inductor
C.
Current Source
D.
Transistor


A.

B.

C.

D.

6.
Ideal voltage source has internal resistance of
2/11
A.
1
B.
10
C.
0
D.
Infinite


A.

B.

C.

D.

7.
Determine the charge when C=0.001uF,and V=1kv
A.
0.001C
B.
1uC
C.
1C
D.
0.001C

C V kv
A.
C
B.
uC
C.
C
D.
C
8.
A series circuit consists of a 4.7kΩ 5.6k 9kΩ and 10kΩ resistor. Which resistor has the most voltage across it
A.
4.7kΩ
B.
5.6kΩ
C.
9kΩ
D.
10kΩ

4.7kΩ 5.6k 9kΩ 10kΩ
A.
4.7kΩ
B.
5.6kΩ
C.
9kΩ
D.
10kΩ
9.
How much energy is stored by a 0.05uf capacitor with a voltage of 100
A.
0.025 J
B.
0.05 J
C.
5 J
D.
100 J

V uf
A.
J
B.
J
C.
J
D.
J
10.
How much energy is stored by a 100mH inductor with a current of 1
A.
100 J
B.
1 J
C.
0.05 J
D.
0.01 J

A mH
A.
J
B.
J
C.

D.
J
11.
In a four branch parallel circuit 5A of current flows in each branch. If one of the branch opens, what is the current in each of the other branches?
A.
Increases
B.
decreases
C.
constant
D.
doubles

5A
A.

B.

C.

D.

12.
Which one is the following is ideal voltage source?
A.
Voltage independent of current
B.
Current independent of voltage
C.
Both and
D.
None of above


A.

B.

3/11
C.

D.

13.
Mesh analysis is based on
A.
KCL
B.
KVL
C.
Both
D.
None


A.
KCL
B.
KVL
C.

D.

14.
The tie-set schedule gives the relation between
A.
Branch current and link currents
B.
Branch voltages and link currents
C.
Branch current and link voltages
D.
None of the above


A.

B.

C.

D.

15.
A practical voltage source consists of
A.
An ideal voltage source in series with an internal resistance
B.
An ideal voltage source in parallel with an internal resistance
C.
both and
D.
None


A.

B.

C.

D.

16.
A practical current source consists of
A.
An ideal current source in series with an impedance
B.
An ideal current source in parallel with an impedance
C.
both and
D.
None


A.

B.

C.

D.

17.
Kirchhoff's second law is related to
A.
IR drops
B.
Battery e.m.fs
C.
Both battery e.m.fs and IR drops
D.
Junction currents


A.
IR
B.
e.m.fs
C.
e.m.fs IR
D.

18.
If a network contains B branches, N nodes, then the number of mesh current equations would be
A.

B.

C.

D.


B N
A.

B.

C.

D.

19.
The cut -set schedule gives the relation between
A.
Branch current and link currents
B.
Branch voltages and link currents
C.
Branch current and link voltages
D.
Branch voltages and tree voltages
4/11


A.

B.

C.

D.

20.
Any closed path in network is called
A.
Branch
B.
Node
C.
Loop
D.
Tree


A.

B.

C.

D.

21.
A terminal where three or more branches meet is known as
A.
loop
B.
node
C.
terminal
D.
anode


A.

B.

C.

D.

22.
Superposition theorem is not valid for
A.
Voltage responses
B.
Current responses
C.
Power responses
D.
All


A.

B.

C.

D.

23.
Norton`s equivalent circuit consists of
A.
Voltage source in parallel with impedance
B.
Voltage source in series with impedance
C.
Current source in series with impedance
D.
Current source in parallel with impedance


A.

B.

C.

D.

24.
Maximum power is transferred when load impedance is
A.
Equal to source impedance
B.
Equal to half of source impedance
C.
Equal to zero
D.
None


A.

B.

C.

D.

25.
Superposition theorem is valid
A.
Only for AC ckts.
B.
Only for DC ckts.
C.
Both
D.
None


A.

B.

C.

D.

5/11
26.
Dual of capacitor is
A.
Resistor
B.
Inductor
C.
Conductor
D.
None


A.

B.

C.

D.

27.
While applying Thevenin`s theorem,
A.
Short ckt. Voltage at the terminals
B.
Open ckt. Voltage at the terminals
C.
Voltage of the source
D.
Total voltage available in the ckt.


A.

B.

C.

D.

28.
The maximum power transfer theorem can be applied
A.
Only for AC ckts.
B.
Only for DC ckts.
C.
both
D.
None


A.

B.

C.

D.

29.
Dual of voltage is
A.
Resistor
B.
Current
C.
Conductor
D.
None


A.

B.

C.

D.

30.
The number of possible combinations generated by four variables taken two at a time in a two- port network is
A.
Two
B.
Four
C.
Five
D.
Six


A.

B.

C.

D.

31.
"The algebraic sum of all branch voltages around any closed path in a circuit is zero." Is a statement of
A.
KVL
B.
KCL
C.
ALL
D.
None


A.
KVL
B.
KCL
C.

D.

32.
The frequency at which resonance occurs is known as
A.
Bandwidth
B.
Critical frequency
C.
Resonance frequency
D.
None


A.

B.

6/11
C.

D.

33.
The quality factor of capacitor is
A.
Qc=ωC/R
B.
Qc=1/ωCR
C.
Qc=ωCR
D.
None of these


A.
Qc=ωC/R
B.
Qc=1/ωCR
C.
Qc=ωCR
D.

34.
Selectivity is equal to
A.
fr/BW
B.
fr*BW
C.
fr-BW
D.
BW/fr


A.
fr/BW
B.
fr*BW
C.
fr-BW
D.
BW/fr
35.
Transformer works on
A.
Ohm's law
B.
Faraday's law
C.
KCL
D.
None


A.

B.

C.
KCL
D.

36.
Dual of mesh analysis is
A.
KVL
B.
KCL
C.
Node Analysis
D.
None


A.
KVL
B.
KCL
C.

D.

37.
In series RLC circuit, if C increases what happens to the resonance frequency.
A.
Increase
B.
Same
C.
Decrease
D.
Zero

C
A.

B.

C.

D.

38
Find quality factor of inductor for L=100 ω=1 and R=10 Ω.
A.
20
B.
10
C.
30
D.
None

L=100 ω=1 R=10 Ω.
A.

B.

C.

D.

39.
In series circuit if R=1ohm and C=1F then fr=
A.

B.

C.

D.


R=1ohm and C=1F fr=
A.

B.

C.

D.

40.
Mutual inductance is a property associated with
A.
One coil
B.
One resistor
C.
Two or more coil
D.
None of these
7/11


A.

B.

C.

D.

41.
What is the phase angle of series RLC circuit at resonance?
A.
Zero
B.
45 0
C.
90 0
D.
30 0


A.

B.

C.

D.

42.
At Resonance
A.
XC XL
B.
XC XL
C.
XC XL
D.
None


A.
XC XL
B.
XC XL
C.
XC XL
D.

43.
Attenuator is used to
A.
Increase frequency level of input signal
B.
decrease power level of input signal
C.
Increase power level of input signal
D.
None


A.


B.


C.


D.

44.
It stops lower frequencies and pass high frequencies.
A.
High pass filter
B.
Low pass filter
C.
Band pass filter
D.
Band stop filter


A.

B.

C.

D.

45.
Fix attenuator is
A.
Shunt
B.
Equalizer
C.
Pad
D.
None of these


A.

B.

C.

D.

46.
Which is phase equalizer?
A.
Series
B.
Lattice
C.
Shunt
D.
Full Shunt


A.
Series
B.
Lattice
C.
Shunt
D.
Full Shunt
47.
Which is two terminals amplitude equalizer?
A.
Full series
B.
Full shunt
8/11
C.
Series
D.
Lattice


A.
Full series
B.
Full shunt
C.
Series
D.
Lattice
48.
The unit of flux is
A.
Weber
B.
Henry
C.
Joule
D.
Ohm


A.

B.

C.

D.

49.
Loss in Neper is
A.
Loge(Vi/Vo)
B.
10log10(Vi/Vo)
C.
10log10(Vi2/Vo2)
D.
None of these


A.
Loge(Vi/Vo)
B.
10log10(Vi/Vo)
C.
10log10(Vi2/Vo2)
D.

50.
The Unit of admittance of the network is
A.
Henry
B.
Ohm
C.
Mho
D.
Ampere


A.

B.

C.

D.

51.
Relation between dB and Neper is
A.
dB=8.686×log10 N
B.
dB=8.686× loge N
C.
dB=0.868× loge N
D.
None of these


A.
dB=8.686× log10 N
B.
dB=8.686× loge N
C.
dB=0.868× loge N
D.

52.
An Attenuator is a
A.
RL network
B.
R`s network
C.
RC network
D.
LC network


A.
RL
B.

C.
RC
D.
LC
53.
Inductive reactance equal to
A.
2πFC
B.
2πFL
C.
1 2πFC
D.
None of above


A.
2πFC
B.
2πFL
C.
1 2πFC
D.

54.
If f1 and f2 are half power frequencies and f0 the resonance frequency, the selectivity of the RLC circuit is given by
A.
f2-f1 f1-f0
B.
f2-f1 f0
C.
f2-f0 f1-f0
D.
f2-f1 2f0

f0 RLC
9/11

A.
f2-f1 f1-f0
B.
f2-f1 f0
C.
f2-fo f1-f0
D.
f2-f1 2f0
55.
If the lower cut- off frequency is 1200 Hz and Higher cut -off frequency is 1600Hz. What is the Bandwidth?
A.
2800 Hz
B.
5200 Hz
C.
2400 Hz
D.
400 Hz

1200 1600
A.
Hz
B.
Hz
C.
Hz
D.
Hz
56.
The primary and secondary winding of transformer are linked each other by
A.
Conduction
B.
Self induction
C.
Mutual Induction
D.
Not linked at all


A.

B.

C.

D.

57.
Active filter circuit contains
A.
Resistor inductor, capacitor and op-amp
B.
Resistor, inductor and capacitor only
C.
Resistor and capacitor only
D.
None of these


A.

B.

C.

D.

58.
On the basis of frequency characteristics filters can be defined as
A.
T filter and filter
B.
Active and passive filter
C.
Low pass, high pass, band pass and band stop
D.
None of these


A.
T
B.

C.

D.

59.
In active filter, input impedance is
A.
Low
B.
High
C.
Moderate
D.
Zero

.
A.

B.

C.

D.

60.
Cut-off frequency of constant k-type low pass filter is given by
A.
Fc= 2π√LC
B.
Fc= π√LC
C.
Fc=1/π√LC
D.
Fc=1/4π√LC

k
A.
Fc= 2π√LC
B.
Fc= π√LC
C.
Fc=1/π√LC
D.
Fc=1/4π√LC
10/11
61.
Cut-off frequency for constant high pass filter is
A.
1/4π√LC
B.
K √LC
C.
L √LC
D.
None of these

k
A.
1 /4π√LC
B.
K √LC
C.
L √LC
D.

62.
Find loss in dB for Pi=100,Po=10
A.
10
B.
15
C.
20
D.
30

Pi=100,Po=10 dB
A.
10
B.
15
C.
20
D.
30
63
For an ideal filter
A.
Zero attenuation in pass band
B.
Infinite attenuation in stop band
C.
Transition region between stop band and pass band would be very small
D.
All


A.

B.

C.

D.

64.
Which elements use to design k-constant T type passive high pass filter?
A.
R
B.
L
C.
C
D.
L C

k T
A.
R
B.
L
C.
C
D.
L C
65.
Which elements use to design m-derived T type passive low pass filter?
A.
R
B.
L
C.
C
D.
All

m T
A.
R
B.
L
C.
C
D.

66.
Which is passive filters classification?
A.
Constant K filters
B.
M derived filters
C.
Both A and B
D.
None


A.
K
B.
M
C.
A B
D.

67.
It stops certain band of frequencies.
A.
Band stop filter
B.
Band rejected filter
C.
Band pass filter
D.
All


A.

B.

C.

D.

68.
The filter which allow all the frequencies above and below that band, but not allow
11/11
certain band of frequencies.
A.
Band stop filter
B.
Band rejected filter
C.
Band pass filter
D.
All


A.

B.

C.

D.

69.
It passes certain band of frequencies.
A.
Band pass filter
B.
Band stop filter
C.
Low pass filter
D.
Band rejected filter


A.

B.

C.

D.

70.
For m-derived low pass filters, resonant frequency is to be chosen so that it is
A.
Above the cut-off frequency
B.
Below the cut-off frequency
C.
Both A B
D.
None of these

M
A.

B.

C.
A B
D.