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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING- C to D Bridge Course Examination WINTER 2018
Subject Code: C320903 Date: 09-01-2019
Subject Name: D.C.circuits
Time: 02:30 PM TO 04:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Each question is of 1 mark.
4. Use of only simple calculator is permitted. (Scientific/Higher Version not allowed).
5. English version is authentic.
No.
Question Text and Option.
1.
For dynamically induced emf e
A.
Blv
B.
Blv
C.
Blv
D.
Blv

emf e
A.
Blv
B.
Blv
C.
Blv
D.
Blv
2.
1 Ω
A.
10-3 Ω
B.
103 Ω
C.
106 Ω
D.
10-6 Ω

1 Ω
A.
10-3 Ω
B.
103 Ω
C.
106 Ω
D.
10-6 Ω
3. The SI unit for measurement of electric charge is
A. Volt
B. ohm
C. Coulomb
D.
None

SI
A.
B.
C.
D.

4. Which among the following is true about ohm's law?
A. I ∝ V
B. V IR
C. I V/R
D. All of these


A. I ∝ V
B. V IR
C. I V/R
D. All of these
5. One coulomb of charge is equal to the charge of
A. 1.095 x 10 -19 electrons
B. 6.242 x 1018 electrons
C. 1.625 x 10-31 electrons
D. 6.025 x 10-19 electrons

1
A. 1.095 x 10 -19 electrons
B. 6.242 x 1018 electrons
C. 1.625 x 10-31 electrons
D. 6.025 x 10-19 electrons
6. According to Kirchoff's voltage law,
A. The algebraic sum of all the e.m.f's in the circuit is zero
B. Algebraic sum all the voltage drops in the circuit is zero
2/10
C. Algebraic sum of e.m.f's plus algebraic sum of voltage drops is equal to zero
D. All of these


A.
emf .
B.

C.
emf .
D.

7. Electrical work is
A. Directly proportional to the potential difference
B. Directly proportional to the charge
C. Directly proportional to the current
D. All of these


A.

B.

C.

D.

8. The unit of electrical energy is are
A. Joules
B. Watt sec
C. Kilowatt hour
D. All of these

A.
B.
C.
D.
9. In any network of wires carrying currents, the algebraic sum of all currents meeting at a point is equal to
A. Sum of all the currents
B. Sum of outgoing current
C. Zero
D. Sum of incoming current


A.
.
B.

C.

D.

10. One kilowatt equals to horse power
A.
1.26
B.
1.36
C.
1.46
D.
1.56


A.
1.26
B.
1.36
C.
1.46
D.
1.56
11. If three resistance R2 R3) are connected in series then
A. V IR1 IR2 IR3
B. V I/R1 I/R2 I/R3
C. I VR1 VR2 VR3
D. I V/R1 V/R2 V/R3 Where V=Potential difference, I=Current
R1, R2 R3
A. V IR1 IR2 IR3
B. V I/R1 I/R2 I/R3
C. I VR1 VR2 VR3
D. I V/R1 V/R2 V/R3 Where V=Potential difference, I=Current
12. When the resistances are connected in parallel circuit then
A. branch currents are additive
B. conductances are additive
3/10
C. powers are additive
D. All of the above


A.

B.

C.

D.

13. The is responsible for the current to flow in a closed circuit.
A. Electric charge
B. Potential difference
C. Resistance
D. All of the above

.
A.

B.

C.

D.

14.
Which of the followings is/are active element?
A.
Voltage source
B.
Current source
C.
Both
D.
None of these.


A.

B.

C.

D.

15.
Which of the following are the passive elements?
A.
Resistor
B.
Bulb
C.
Both
D.
None of these.


A.

B.

C.

D.

16.
Internal resistance of ideal current source is
A.
Zero
B.
Infinite
C.
Finite
D.
100 ohms


A.

B.

C.

D.

17.
Which quantity consists of a unit 1KWh
A.
Energy
B.
Time
C.
Power
D.
Charge

1KWh
A.

B.

C.

D.

18.
Which of the following quantities consists of SI unit as WATT
A.
Force
B.
Charge
C.
Current
D.
Power


A.

B.

C.

D.

19. What will be the resistance if 10 resistors of 10 ohm each is connected in series
A.
100
B.
20
C.
10
D.
50
10 ohm 10
A.
100
B.
20
C.
10
D.
50
20. Resistivity of a wire depends on
A.
Length
B.
Material
C.
c/s area
D.
All of above


A.

B.

4/10
C.

D.

21.
Kirchhoff's second law is based on law of conservation of
A.
Energy
B.
Charge
C.
Momentum
D.
mass


A.

B.

C.

D.

22.
Ampere second could be the unit of
A.
Current
B.
Charge
C.
Energy
D.
condctance

Ampere second
A.

B.

C.

D.

23. Ohm's law is not applicable to
A. DC circuits
B. small resistors
C. high currents
D.
Semi conductor


A.

B.

C.

D.

24. Thevenin's theorem can be applied to network containing
A. Passive elements only
B. Active elements only
C. Linear elements only
D.
All of these


A.

B.

C.

D.

25. The rating of fuse wire is expressed in terms of
A. Ohms
B. Mhos
C. Amperes
D. Watts.


A. Ohms
B. Mhos
C. Amperes
D. Watts.
26. The unit of Capacitance is
A. Ohms
B.
Volts
C.
Farad
D.
henry


A.

B.

C.

D.

27. The unit of inductance is
A. Ohms
B.
Volts
C.
Farad
D.
henry


A.

B.

C.

D.

28. Magnetic flux has the unit of
5/10
A.
Ampere
B.
Tesla
C.
Weber
D.
Ampere Turn


A.

B.

C.

D.

29. Thevenin's Voltage is
A. Open circuit voltage
B. closed circuit voltage
C. Short circuit voltage
D.
None


A.

B.

C.

D.

30. Ohm's Law is Applicable at Conditions
A. Constant Temperature
B. Constant pressure
C. Constant volume
D.
None


A.

B.

C.

D.

31. KCL is applicable at
A.
Junction
B.
Loop
C.
Resistor
D.
mesh
KCL
A.

B.

C.

D.

32. In parallel Connection of elements Parameter is Same
A.
CURRENT
B.
Voltage
C.
Power
D.
Resistor


A.

B.

C.

D.

33. In Series Connection of elements Parameter is Same
A.
CURRENT
B.
Voltage
C.
Power
D.
Resistor


A.

B.

C.

D.

34. One Farad Is Equal To
A.
1 v
B.
1 c/v
C.
1 v/c
D.
1 H

1
A.
1 v
B.
1 c/v
C.
1 v/c
D.
1 H
35. Four resistors each of 20 ohm are connected in parallel, the total resistance is
A.
80
B.
20
C.
10
D.
5
20 ohm 4
A.
80
B.
20
C.
10
D.
5
36. The polarity of the induced voltage is determined by
A. Ampere's law
B. Lenz's law
6/10
C. Kirchhoff's law
D.
none

.
A.

B.

C.

D.

37. An ideal voltage source should have:
A. Zero source resistance
B. Infinite source resistance
C. Terminal voltage is proportional to current
D.
none


A.

B.

C.
.
D.

38. The nodal method of circuit analysis is based on
A. KVL ohms law
B. KCL ohms law
C. KVL KCL
D. KVL ohms law+KCL

.
A. KVL ohms law
B. KCL ohms law
C. KVL KCL
D. KVL ohms law+KCL
39.
The relation between D and E is given by the expression
A.
εo εr E
B.
D εo εr
C.
εo εr D
D.
both and

D E
A.
εo εr E
B.
D εo εr
C.
εo εr D
D.
both and
40.
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is
A.
0.024 F
B.
0.12 F.
C.
0.60 F.
D.
0.80 F

10 volts 0.24 coulombs
A.
0.024 F
B.
0.12 F.
C.
0.60 F.
D.
0.80 F
41.
A 4 ohm resistance having current of 10 A will dissipate the power of
A.
200 w
B.
400 w
C.
600 w
D.
800 w

4 ohm 10 A
A.
200 w
B.
400 w
C.
600 w
D.
800 w
42.
Thevenin's theorem is form of an equivalent circuit.
A.
Voltage
B.
current
C.
Voltage and current
D.
None


A.

B.

C.

D.

43.
The superposition theorem is used when the circuit contains.............
7/10
A.
A single voltage source
B.
A number of voltage sources
C.
Passive elements only
D.
None of the above


A.

B.

C.

D.

44.
An active element in a circuit is one which
A.
Receives energy
B.
Supplies energy
C.
Both receives and supplies
energy
D.
None of the above


A.

B.
.
C.
.
D.

45.
When cells are arranged in parallel
A.
The current capacity increase
B.
The current capacity decrease
C.
The e.m.f. increases
D.
The e.m.f. decreases


A.

B.

C.
emf
D.
emf
46.
Conductivity is the reciprocal of
A.
Current density
B.
Resistance
C.
Resistivity
D.
None of the above


A.

B.

C.

D.

47.
Condition for maximum transfer of power from source to load is
A.
RL ∞
B.
RS RL
C.
RS RL
D.
RS RL


A.
RL ∞
B.
RS RL
C.
RS RL
D.
RS RL
48.
Which is the dual of Thevenin's Theorem
A.
Superposition Theorem
B.
Maximum Power Transfer Theorem
C.
Kirchhoff's Laws
D.
Norton's Theorem


A.

B.

C.

D.

49.
Energy stored by capacitor is given by formula
A.
½*Q/C
B.
½*Q/C2
C.
½*CV
D.
½*Q2/C


A.
½*Q/C
B.
½*Q/C2
C.
½*CV
D.
½*Q2/C
50.
R-C Time constant is denoted by
8/10
A.
α
B.
β
C.
θ
D.
λ

R-C
A.
α
B.
β
C.
θ
D.
λ
51.
When two capacitors of 8 connected in parallel the total capacitance will be
A.
16
B.
8
C.
64
D.
80

8
A.
16
B.
8
C.
64
D.
80
52.
Equivalent current source of 40 4 Ω voltage source is
A.
20 2 Ω
B.
20 4 Ω
C.
10 4 Ω
D.
5 2 Ω

40 4 Ω
A.
20 2 Ω
B.
20 4 Ω
C.
10 4 Ω
D.
5 2 Ω
53.
Work time
A.
Energy
B.
Power
C.
Joule
D.
Volt


A.

B.

C.

D.

54.
With constant temperature V/I
A.
Constant
B.
Decreases
C.
Increases
D.
None of the above

V/I
A.

B.

C.

D.

55.
The filament of an electric bulb is made of
A.
Carbon
B.
Nickel
C.
Tungsten
D.
Aluminium


A.

B.

C.

D.

56.
Unit of potential difference is
A.
Ampere
B.
watt
C.
Newton
D.
Volt


A.

B.

C.

D.

57.
Which of the following statement is True? Unit of conductance is
A.
Ohm and symbol is G
B.
Ohm and symbol is R
C.
Siemens and symbol is R
D.
Siemens and symbol is G


A.
G
B.
R
C.
R
D.
G
58.
Whenever flux linked with the circuit changes
A.
Power is induced
B.
EMF is induced
9/10
C.
Current is induced
D.
None of the above


A.

B.
emf
C.

D.

59.
Energy stored in magnetic field of a coil is
A.
LI2
B.
½ L2I2
C.
½ LI2
D.
L2I2


A.
LI2
B.
½ L2I2
C.
½ LI2
D.
L2I2
60.
Silicon diode is a
A.
Unilateral element
B.
Linear element
C.
Bilateral element
D.
Nonlinear element


A.

B.

C.

D.

61.
Property of is to store charge.
A.
Capacitor
B.
Inductor
C.
Resistor
D.
Semi conductor

.
A.

B.

C.

D.

62.
Volt
A.
Joule coulomb
B.
Joule X coulomb
C.
Coulomb joule
D.
None of the above


A.
Joule coulomb
B.
Joule X coulomb
C.
Coulomb joule
D.
None of the above
63.
When an uncharged body is brought near the charged body, the uncharged body gets
A.
Attracted
B.
Charged
C.
Repelled
D.
No effect


A.

B.

C.

D.

64.
Two like charges
A.
Attract each other
B.
Neither A or B
C.
Repel each other
D.
All of above


A.

B.

C.

D.

65.
Two alike charges
A.
Attract each other
B.
Neither A or B
C.
Repel each other
D.
All of above


A.

B.

10/10
C.

D.

66.
Permittivity of vacuum is
A.
8.854 X 10-12 farad/metre
B.
1 farad/metre
C.
8.854 X 10-12
D.
1


A.
8.854 X 10-12 farad/metre
B.
1 farad/metre
C.
8.854 X 10-12
D.
1
67.
Three resistors of 15 Ω are connected in delta. Each resistance of equivalent star connection will be
A.
10 Ω
B.
40 Ω
C.
5 Ω
D.
30 Ω

15 Ω
A.
10 Ω
B.
40 Ω
C.
5 Ω
D.
30 Ω
68.
The point at which two or more elements meet is called
A.
Branch
B.
Mesh
C.
Loop
D.
Node


A.

B.

C.

D.

69.
When three resistance of 10 Ω are connected in series their equivalent resistance is
A.
3.33 Ω
B.
10 Ω
C.
3.0 Ω
D.
30 Ω

10 Ω
A.
3.33 Ω
B.
10 Ω
C.
3.0 Ω
D.
30 Ω
70.
Conductance
A.
1/XL
B.
1/L
C.
1/R
D.
1/C


A.
1/XL
B.
1/L
C.
1/R
D.
1/C