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Seat No. Enrolment No.:
Gujarat Technological University
Diploma Engineering C to D Bridge Course Examination
Subject Code: C300014 Date: 04 /01/2019
Subject Name: Basic of Electrical and Electronics Engineering
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.
Sr.No
Question Text and Option.

1
Unit of power is.......
A
Watt
B
Volt
C
Ampere
D
Ohm

........
A

B

C

D

2
Ohm's law
A
P=IR
B
R=IV
C
V=IR
D
R=PI


A
P=IR
B
R=IV
C
V=IR
D
R=PI
3
Flow of electric current in conductor is due to flow of
A
Electron
B
Proton
C
Neutron
D
None


A

B

C

D

4
Unit of Voltage is……….
A
Volt
B
Ampere
C
Watt
D
None


A

B

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C

D

5
Instrument use for measurement of current is known as
A
Thermometer
B
Ammeter
C
Voltmeter
D
Wattmeter


A

B

C

D

6
Multimeter used for measurement of
A
AC only
B
DC only
C
AC and DC both
D
None


A
AC
B
DC
C
AC and DC
D

7
Unit of resistance is
A
Ohm
B
Volt
C
Watt
D
None


A

B

C

D

8
Which one is static device?
A
Motor
B
Generator
C
Transformer
D
None


A

B

C

D

9
Which of the following is Active Element
A
Current source
B
Resistance
C
Inductance
D
Capacitance


A

B

C

D

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10
A current is said to be alternating when it change in
A
Magnitude only
B
Direction only
C
Both A B
D
None


A

B

C
A B
D

11
Power factor of practical inductor is
A
Unity
B
Zero
C
Lagging
D
Leading


A

B

C

D

12
Which quantity remain constant in series connection
A
Current
B
Voltage
C
EMF
D
None


A

B

C
EMF
D

13
Dielectric strength of medium is depend on
A
Temperature
B
Moisture
C
Thickness
D
All of above


A

B

C

D

14
Unit of inductor is
A
Henry
B
Weber
C
Ohm
D
Ampere


A

B

C

D

15
Transformer can transmit
A
Current
B
Voltage
C
Power
D
None
Page 4 of 14


A

B

C

D

16
Standard frequency for ac power in India is
A
40Hz
B
50Hz
C
60Hz
D
70Hz


A
40Hz
B
50Hz
C
60Hz
D
70Hz
17
Form factor for alternating quantity is
A
1.2
B
2.44
C
2
D
1.11


A
1.2
B
2.44
C
2
D
1.11
18
For purely resistive circuit phase difference between voltage and current is
A
90 degree
B
45 degree
C
25 degree
D
0 degree


A
90 degree
B
45 degree
C
25 degree
D
0 degree
19
Lux meter is used to measure
A
Light intensity
B
Flux
C
Mmf
D
Speed of machine


A

B

C
MMF
D

20
Which of the following is not an example of conductor
A
Copper
B
Aluminum
C
Mica
D
Silver


A

B

C

D

21
Resistance of 200 250 V lamp will be
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A
625 Ω
B
312.5Ω
C
1250Ω
D
31.25Ω

200 250 V
A
625 Ω
B
312.5Ω
C
1250Ω
D
31.25Ω
22
RMS value of Alternating current is indicated by
A
0.5 Imax
B
Imax/√3
C
Imax/√2
D
Imax


A
0.5 Imax
B
Imax/√3
C
Imax/√2
D
Imax
23
The induced emf in a transformer depends on
A
Frequency
B
Number of turns
C
Maximum value of flux
D
All of the above


A

B

C

D

24
The arrow in a Transistor symbol indicates the direction of current in
A
Base
B
Collector
C
Emitter
D
None of these


A

B

C

D

25
The potential barrier acts as an barrier against the flow of
A
Electrons
B
Holes
C
A B
D
None of these


A

B

C
A B
D

26
Which electromagnetic device uses brushes and a commutator?
A
Speaker
B
DC generator
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C
Relay
D
Solenoid


A

B

C

D

27
The transformers are rated in.........
A
KVA
B
KV
C
KW
D
KVAR

............
A
KVA
B
KV
C
KW
D
KVAR
28
In N type Semiconductor material Minority charge would be?
A
Electron
B
Proton
C
Newton
D
Hole

N-Type
A

B

C

D

29
Megger is used to measure
A
Insulation resistance
B
Current
C
Flux
D
Energy


A

B

C

D

30
Silicon is an example of
A
Conductor
B
Insulator
C
Semi conductor
D
Super conductor


A

B

C

D

31
1 Metrix HP is equal to how much watt?
A
735.5 W
B
746 W
C
736.5 W
D
745 W

1 H.P.
A
735.5 W
B
746 W
C
736.5 W
D
745 W
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32
If two 5 Ohm resistances connected in parallel then find out equivalent resistance.
A
2.5 Ohm
B
10 Ohm
C
5 Ohm
D
7.5Ohm

5 Ohm
A
2.5 Ohm
B
10 Ohm
C
5 Ohm
D
7.5 Ohm
33
1 Micro Volt ……….. Volt
A
10-3
B
10-6
C
103
D
106

1 .............
A
10-3
B
10-6
C
103
D
106
34
AC Current induced in armature is convert to DC by ………………..
A
Brush Holder
B
Field
C
Rotor
D
Commutator

AC ............
A

B

C

D

35
In Fleming Right hand rule Thumb indicate direction of quantity.
A
Current
B
Voltage
C
Conductor speed
D
Magnetic flux


A

B

C

D

36
In half Wave Rectifier Vdc ……………Vrms
A
0.45 V
B
0.55 V
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C
0.707 V
D
0.636 V

Vdc ……………Vrms
A
0.45 V
B
0.55 V
C
0.707 V
D
0.636 V
37
In which condition ELCB used for Protection purpose.
A
Open circuit
B
Short Circuit
C
Over load
D
Ground Fault

ELCB
A

B

C

D

38
In Induction Motor Slip S ………..
A
Ns N
B
Ns N
C
N Ns
D
N Ns

S ………….
A
Ns N
B
Ns N
C
N Ns
D
N Ns
39
How much electron in outer orbit of Silicon?
A
2
B
3
C
4
D
5


A
2
B
3
C
4
D
5
40
Ratio of Maximum Value and RMS Value is Known as.
A
Form Factor
B
Power factor
C
Effective Factor
D
Crest Factor


A

B

C

D

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41
Which Voltage is Measure by AC voltmeter?
A
RMS
B
Average
C
Peak
D
Peak to Peak

. .
A
.
B

C

D

42
………. Used for making tips of soldering Iron.
A
Steel
B
Chromium
C
Tin
D
Copper

.
A

B

C

D

43
A device that transforms electrical energy to mechanical energy is a
A
Generator
B
Motor
C
Transformer
D
None of these


A

B

C

D

44
Which instrument has lowest resistance?
A
Ammeter
B
voltmeter
C
frequency meter
D
Megger


A

B

C

D

45
Measuring range of voltmeter can be extended by using
A
high shunt resistance
B
high series resistance
C
low shunt resistance
D
low series resistance


A

B

C

D

A 60Hz 2 pole alternator should run at
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46
A
3000 r.p.m.
B
1500 r.p.m
C
3600 r.p.m
D
1800 r.p.m.

60Hz 2
A
3000 r.p.m.
B
1500 r.p.m
C
3600 r.p.m
D
1800 r.p.m.
47
The full name of LED is:
A
Light Emitting Display
B
Light Emitting Detector
C
Light Emitting Diode
D
Low Energy Display

LED
A

B

C

D

48
How many Terminals does Transistor consist of.
A
2
B
3
C
4
D
5


A
2
B
3
C
4
D
5
49
How many Terminals does Wattmeter consist of
A
2
B
4
C
3
D
6


A
2
B
4
C
3
D
6
50
Which of the following is P type semiconductor
A
Bismuth
B
Arcon
C
Phosphorous
D
Boron

P
A

B

C

D

51
How many layer are there in SCR
A
2
B
3
C
4
D
5

SCR
A
2
B
3
C
4
D
5
52
Which of the following is not the operating mode of 555 timer
A
Monostable
B
Astable
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C
Bistable
D
Multistable

555
A

B

C

D

53
Which of the following is not a part of dc machine
A
Armature
B
Commutator
C
Field Winding
D
Damping Winding


A

B

C

D

54
Which of the following AC motor widely used?
A
Squirrel cage motor
B
Slip ring motor
C
Double cage motor
D
Synchronous motor


A

B

C

D

55
__.........__ is a safety wire which protects us from electric shocks.
A
Earth wire
B
Neutral wire
C
Live wire
D
None of these

............
A

B

C

D

56
Voltmeter is used in circuit with ………..connection
A
Series
B
Parallel
C
A B
D
none of the above

.........
A

B

C
A B
D

57
Which machine is used for battery charging
A
Dc series generator
B
Compounded dc generator
C
Dc shunt generator
D
none of these


A
Dc
B
Dc
C
Dc
D

Page 12 of 14
58
Factors affecting resistance is/are
A
Length of conductor
B
Type of material
C
Area of conductor
D
All of the above


A

B

C

D

59
For an AC system an inductive reactance is given by
A
Rc 2πfC
B
XL 2πfL
C
Xc 1/2πfC
D
None of above

AC
A
Rc 2πfC
B
XL 2πfL
C
Xc 1/2πfC
D
None of above
60
If two capacitors C1 and C2 are connected in parallel, then total capacitor
A
C=C1 C2
B
C=C1 C2
C
C=C1 ÷ C2
D
C=C1 X C2

C1 C2 .......
A
C=C1 C2
B
C=C1 C2
C
C=C1 ÷ C2
D
C=C1 X C2
61
Diode is working as
A
Wire
B
Switch
C
Voltage source
D
None of above


A

B

C

D

62
How many diodes in full wave rectifier?
A
2
B
3
C
4
D
5
62

A
2
B
3
C
4
D
5
63
What type of impurity can be added to make N type semiconductor?
A
Acceptor
B
Donor
C
A& B
D
None of above

N
A

B

C
A& B
D

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64
If stator field is rotating in clockwise direction rotor rotates in
A
Cannot predict
B
Anticlockwise
C
Any direction
D
Clockwise


A

B

C

D

65
In which region transistor is working as amplifier
A
Active
B
Saturation
C
Cut-off
D
All of the above


A

B

C

D

66
The direction of rotation of a DC motor can be reversed by
A
Changing the supply polarity
B
Reversing the armature connection
C
Reversing the field connection
D
None of above

DC
A

B

C

D

67
In which type of capacitor negative and positive polarity is there
A
Ceramic
B
Electrolytic
C
Carbon film
D
Metal film


A

B

C

D

68
Three Phase Synchronous motor have slip rings.
A
0
B
2
C
3
D
4

.........
A
0
B
2
C
3
D
4
69
Which signal are not passing from capacitor?
A
Sine wave
B
Square wave
C
DC
D
All of above
Page 14 of 14


A

B

C
DC
D

70
For forbidden energy gap 1 electron volt is equal to……
A
2.7*10-5 J
B
1.6*10-15 J
C
1.6*10-19 J
D
1 J

1 ..........
A
2.7*10-5 J
B
1.6*10-15 J
C
1.6*10-19 J
D
1 J