1)
No. of electrons in Hydrogen
atom
a)
1
b)
2
c)
3
d)
None of the above
Ans: - a
2)
The Ampere is the unit of
measure of:
a)
Conductance
b)
Electromotive force
c)
Magnetomotive force
d)
Current
Ans: - d
3)
The
Volt is the unit of measure of:
a)
Resistance
b) Electromotive force
c)
Current
d)
Magnetomotive
force
Ans: - b
4)
The
Henry is the unit of:
a)
Capacitance
b)
Resistance
c) Inductance
d)
Conductance
Ans: - c
5)
Substance
which have very few free electrons are called:
a)
Inductors
b)
Conductors
c)
Coulombs
d) Insulators
Ans: - d
6)
Select
the schematic symbol of a photodiode
|
A
|
 |
|
B
|
 |
|
C
|
 |
|
D
|
 |
Ans: - b
7)
The
algebraic sum of all the voltages in a given circuit is ______
a)
1
b)
Maximum
c)
Minimum
d) Zero
Ans: - d
8)
100 mA
is equal to
a) 0.1A
b)
1*103A
c)
1* 10-3
A
d)
1* 106
A
Ans: - a
9)
A 30
volts RMS sine wave has a peak value of
a) 42.4 volts
b)
48.5
volts
c)
21.2
volts
d)
25
volts
Ans: - a
10)
Effective
Value = _________* peak value
a)
0.25
b)
0.36
c)
0.636
d) 0.707
Ans: - d
11)
When
the varying magnetic field of an inductor induces a voltage into a nearby
inductor is called:
a) Mutual Inductance
b)
Self
inductance
c)
Capacitance
d)
Mutual
Capacitance
Ans: - a
12)
What
is the turns ratio of a transformer which has a primary voltage of 400VAC and a
secondary voltage of 100 VAC?
a)
5:1
b)
4:2
c)
3:1
d) 4:1
Ans: - d
13)
If a
transformer has a primary to secondary turns ratio (Np: Ns) of 10: 1 and the
primary current is 200 mA, what is the secondary current?
a)
500 mA
b)
800 mA
c)
1A
d) 2A
Ans: - d
14)
Why is
it important to match impedances in the transformer?
a) To obtain maximum power output.
b)
To
obtain maximum Voltage output.
c)
To
obtain maximum current output.
d)
To
obtain minimum voltage output.
Ans: - a
15)
The
formula for inductive reactance is:
a)
XL
= 1/ (2∏fL)
b) XL = 2∏fL
c)
XL
= 2∏fC
d)
XL
= 1/(2∏fC)
Ans: - b
16)
What
is the total inductance of the circuit shown in the following figure?
a)
15.3mH
b) 14.3mH
c)
1.6mH
d)
2mH
Ans: - b
17)
What
is the total capacitance of the circuit shown in the following figure?
a) 57pF
b)
4.3pF
c)
5pF
d)
48pF
Ans: - a
18)
N-type
semiconductor material has a /an
a) Excess of electrons
b)
Excess
of neutrons
c)
Deficiency
of electrons
d)
Deficiency
of protons
Ans: - a
19)
The
instrument that displays AC waveforms graphically is a /an:
a)
Voltmeter
b)
Ammeter
c)
Ohmmeter
d) Oscilloscope
Ans: - d
20)
Barrier
potential for Ge diode is –
a) 0.3 v
b)
0.9 v
c)
0.7 v
d)
0.5 v
Ans: - a
21)
Efficiency
of full wave rectifier is –
a)
40.2%
b)
90.3%
c) 80.6%
d)
None
of them
Ans: - c
22)
The waveform shown in following figure is a
The waveform shown in following figure is a
a)
Sky
wave
b)
Sine
wave
c)
Square
wave
d) Triangular wave
Ans: - d
23)
An
earth connection or common reference point within a circuit is called:
a)
Potential
b) Ground
c)
Flux
d)
Current
Ans: - b
24)
The waveform shown in following figure is
a
The waveform shown in following figure is
a
a)
Sky
wave
b)
Sine
wave
c) Square wave
d)
Triangular
wave
Ans: - c
25)
Average
Value = _________* Peak value
a)
1.414
b)
0.36
c) 0.636
d)
0.707
Ans: - c