Feb 2018
ELECTRICIAN
THEORY
SEMESTER-I
PART-2
26. Which
resistor will be physically
larger in
size? .......
a) 100 Ω, 10 W
b) 10 Ω, 50 W
c) 1 MΩ, 1/2 W
a) 1 kΩ, 1 W
ANSWER:- b)
10 Ω, 50 W
27. Two
resistor are said to be
connected in-parallel when -
a) Same
current passes in turn
through both
b) Both
carry the same value
of current
c)
Voltage across each resistance
are same
d)
Voltage across each resistance
are
not same
ANSWER:- c)
Voltage across each
resistance are same
28. The
electrical resistance of
human body is around .....
a) 5 ohms
b) 25
ohms
c) 250
ohms
d) 1000
ohms
ANSWER:- d)
1000 ohms
29. A3 Ω resistor having 2A current
will dissipate the power of.....
a)2W
b)4W
c)8W
d) 12 W
ANSWER:- d)
12 W
30. The
filament of an electric
bulb is
made of......
a) Carbon
b) Nickel
c) Aluminium
d) Tungsten
ANSWER:- d)
Tungsten
31. An
current of 6 A is same as ...
a) 6
Joule / Second
b) 6
Coulomb / Second
c) 6 Watt
/Second
d) None
of these
ANSWER:- b)
6 Coulomb / Second
32. The
equation of alternating
current
is i=42.4 sin 621t. Then
the
average value of current
a) 42.42A
a) 42.42A
b) 27 A
c) 38 A
d) 22A
ANSWER:- b) 27 A
33. The
rms value of a half wave
rectified
symmetrical square wave
current
of 2 A by.......
a) 0.707
A
b) 1 A
c) 1.414
A
d) 1.732
A
ANSWER:- c)
1.414 A
34. 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
ANSWER:- a)
0.024 F
35. If
the sheet of a backelite is
inserted between the plates of
an air
capacitor, the capacitance
will
.........
a)
Decrease
b)
Increase
c)
Becomes zero
d)
Remains unchanged
ANSWER:- b)
Increase
36. Three
capacitors each of
capacity
C are given. The resultant
capacity
(2/3) C obtained by
using
them ..........
a) All in
series
b) All in
parallel
c) Two in
parallel and third in series
with this combination
d) Two in
series and third in parallel
across this combination '
ANSWER:- c)
Two in parallel and
third in
series with this combination
37. The
power dissipated in a pure
capacitor
is ........
a) Zero
b)
Proportional to applied voltage
c)
Proportional to the value of capa
citance
d) Both
(b) & (c)
ANSWER:- a)
Zero
38. Three
element having conductance
Gb G2 and
G3 are connected in
parallel.
Their ' combined conductance
will be
.....
a) (
+ 
+ 
)¯¹
+ + )¯¹
b) + +
+ +
c) 1/+ 1/ + I/ ₁
+ 1/ + I/ ₁
d) (1/+ 1/ + I/) ¯¹
+ 1/ + I/) ¯¹
ANSWER:- b) + +
+ +
39. Which
of the following materials
has
highest electrical conductivity?
a)Steel
b)
Aluminium
c) Copper
d) Silver
ANSWER:- d)
Silver
40. If the phase angle between
voltage
and current of a l-Ф AC
current
is 60°, then factor is the
circuit
is ......
a) 0.2
b) 0.5
c) 0.707
d) 1.0
ANSWER:- b) 0.5
41. The
current in the resistor R
shown in
Figure will be ......
a) 0.2 A
b) 0.4A
c) 0.6A
d) 0.8A
ANSWER:-
42. Which
of the following has
positive
temperature coefficient?
a) Germanium
a) Germanium
b) Gold
c) Paper
d) Rubber
ANSWER:- b)
Gold
43. Which
law(s) find application
in
electrolysis?
a) Ohms'
law
b)
Gauss's law
c)
Faradays' law
d)
Coulomb s
ANSWER:- c)
Faradays' law
44. Silver
coating is provided for ...
a)
Protective purpose .
b)
Decorative purpose
c)
Bearing surface
d) All of
these
ANSWER:- d)
All of these
45. The
permanent magnets are
made from
which of following
materials?
a) Soft
iron
b)
Ferromagnetic
c)
Paramagnetic
d)
Diamagnelic
ANSWER:- b)
Ferromagnetic
46. The
Biot-savarfs law is a
general
modification of......
a)
Kirchhoff s law
b) Lenz's
law
c)
Ampere's law
d)
Faradays' law
ANSWER:- c)
Ampere's law
47. 1
Maxwell is the same as ...
a) 
weber
weber
b) 
weber
weber
c) 
weber
weber
d) 
weber
weber
ANSWER:- b)
weber
weber
48. The
direction of induced
emf can
be found by .....
a)
Laplace's law
b)
Kirchhoff's
voltage
law
c) Lenz's
law
d)
Fleming's right hand rule
ANSWER:- d)
Fleming's right
hand rule
49. A
closed switch has a
resistance
of ......
a) Zero
b) About 50 ohms
c) About
500 ohms
d)
Infinite
ANSWER:- a)
Zero
50. The energy stored in an
inductor of inductor L Henry
is
represented as ......
a)
L
a)
L
b) 
c) (l/2)L
d) 
/i
/i
ANSWER:- c) (l/2)L
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