Electrical Engineering practice bits -22
ohm
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MCQ Questions With Answers
1. An
RLC circuit has R=10Ω X2=20Ω, XC=30Ω. The impedance of
the circuit is given by
a. Z=10+j20
b. Z=10+j50
c. Z=10-j20
d. Z=10-j10
2. Ideal
current source having an internal resistance is
a. Zero
b. Infinity
c. 1Ω
d. None
3. The
unit of magneto-motive force is
a. Weber
b. Amp/m
c. Henry
d. Amp-turn
4. Nichrome
wire is commonly used for
a. Heating
element
b. Filament
lamp
c. Flux
rescent tube
d. Motor
winding
5. Five
resistors of 2 ohm each are available. The minimum resistance that can be
obtained by connecting all these will be
a. 
ohm
ohmohm
d.
2 ohm
6.
Inductance is defined as
a.
Rate of change of flux
b.
Rate of change of current
c.
Rate of change of emf
d.
Change of flux linkages per ampere
7.
What is the value of operator vector J2
is ___
a.
0
b.
-1
c.
1
d. 
8.
A coil has an inductive reactance of 4Ω
and a resistance of 3Ω. The admittance of the coil is
a.
3+j4Ω
b.
3-j4Ω
c.
0.6-jo8
d.
0.12-jo6
9.
The voltage across R and L is series RL circuit are found to be
8V and 6V respectively. The total rms voltage across the combination is
a.
10V
b.
20V
c.
14V
d.
48V
10.
Minimum number of watt meters required to
measure power in either balanced or unbalanced 3-phase load are
a.
1
b.
2
c.
3
d.
4
11.
MI
Voltmeter reads ____ valve
a.
Instantaneous
b.
Average
c.
RMS value
d.
Peak value
12.
Out of the following ____ wave is
peakiest
a.
Sinusoidal
b.
Square
c.
Rectangular
d.
Triangular
13.
The form factor of dc supply voltage is
always
a.
Zero
b.
0.5
c.
1.11
d.
1
14.
The power factor of RC circuit is
a.
Zero
b.
Between 0 to 1
c.
1.0
d.
None
15.
Formula for form factor (FF)
a. FF=
b. FF=
c. FF=
d. FF=
16. The
relation between electric flux density D and electric intensity E in a medium
is given by
a. D=E/
b. D=
c. D=
d. None
17. For
parallel combination of capacitors
a. Charge
divides
b. Capacitance
increases
c. Voltage
remains same
d. All
the above
18. A
50µ F capacitor is charged from a 200V supply. The electrostatic energy stored
in it is
a. 2
joules
b. 4
joules
c. 1
joule
d. 2.5
joules
19. One
ampere-hour delivered by a secondary cell is equal to
a. 360
coulombs
b. 60
coulombs
c. 3600
coulombs
d. 100
coulombs
20. The
electrode for a battery must be
a. A
good conductor of electricity
b. A
bad conductor of electricity
c. A
semi conductor
d. An
insulator
Answers
1.d
|
2.b
|
3.d
|
4.a
|
5.b
|
6.d
|
7.b
|
8.d
|
9.a
|
10.b
|
11.c
|
12.d
|
13.d
|
14.b
|
15.a
|
16.b
|
17.d
|
18.c
|
19.c
|
20.a
|
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