WorksheetsElect_Part_3
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
How many terminals are in a diode_______
a)
2
b)
4
c)
1
2.
The turn on voltage of a Ge junction diode is nearly __________ V.
a)
0.7
b)
0
c)
0.3
d)
None of the above
3.
Another name of depletion layer is_______
a)
Barrier Potential
b)
Potential difference
c)
Potential energy
d)
Both a and b
4.
The turn on voltage of a Si junction diode is nearly __________ V.
a)
0.7
b)
0
c)
0.3
d)
None of the above
5.
When the diode is forward biased it acts as ___________
a)
Open switch
b)
Closed switch
c)
Both a and b
d)
None of these
6.
If the diode is reverse bias and hence doesn’t conduct because diode act as ___________
a)
Open switch
b)
Closed switch
c)
Both a and b
d)
None of these
7.
The maximum voltage that can be applied to a diode without destroying it is called _____________
breakdown voltage
a)
peak voltage
b)
knee voltage
c)
peak inverse voltage
d)
breakdown voltage
8.
An ideal diode is like __________ when forward biased.
a)
open switch
b)
closed switch
c)
resistor
d)
none of these
9.
An ideal diode conducts in forward direction with ____________ resistance.
a)
Infinite
b)
1
c)
Zero
d)
Maximum
10.
When Temperature increases the barrier potential of a diode____
a)
Increases
b)
decreases
c)
is constant
d)
none of these
11.
In Half wave rectifier, _________number of diodes are used.
a)
1
b)
2
c)
3
d)
4
12.
In centre tapped full wave rectifier, _________number of diodes are used.
a)
1
b)
2
c)
3
d)
4
13.
The number of diodes used in bridge rectifier are __________
a)
1
b)
2
c)
3
d)
4
14.
The circuit which removes ripples present in the output of rectifier is ___________
a)
regulator
b)
filter
c)
lubricant
d)
Transformer
15.
The example for filter is _______
a)
Resistor
b)
Switch
c)
Capacitor
d)
Transformer
16.
A peak detector circuit requires a minimum of two components a Capacitor and a _____________
a)
Diode
b)
Resistor
c)
Inductor
d)
None of these
17.
A voltage multiplier circuit requires a minimum of two components a diode and a _____________
a)
Capacitor
b)
Resistor
c)
Inductor
d)
None of these
18.
A full wave doubler voltage multiplier circuit requires a minimum of two components a diode and a _____________
a)
Capacitor
b)
Resistor
c)
Inductor
d)
None of these
19.
A clipper circuit always ___________
a)
Needs a DC source
b)
introduce a dc level into an ac signal
c)
clips Only upper portion of the signal
d)
clips some part of the input signal
20.
The clipping level is primarily determined by ___________
a)
shape of the input waveform
b)
battery voltage
c)
value of the resistor
d)
knee voltage of the diode
21.
The primary function of a clamper circuit is to __________
a)
suppress variations in signal voltage
b)
raise positive half cycle of the signal
c)
lower negative half cycle of the signal
d)
introduce a dc level into an ac signal
22.
A zener diode is always __________
a)
Forward bias
b)
Reverse bias
c)
Both forward and reverse
d)
None of the above
23.
When the zener diode is in forward bias it shows the characteristics of an _______
a)
Special purpose diode
b)
Ordinary diode
c)
Tunnel diode
d)
Varactor diode
24.
Zener diodes are _______
a)
specially doped pn junction
b)
lightly doped pn junction
c)
Normally doped pn junction
d)
A&C
25.
Zener diodes are commonly used as ___________
a)
Voltage regulators
b)
clippers
c)
tunnel diodes
d)
Schottky diodes
26.
Impact ionization of electron -hole pair causes the ________Breakdown
a)
Zener breakdown
b)
Energy band gap
c)
Avalanche breakdown
d)
None of these
27.
A LED resembles a basic ___________ diode.
a)
NPN
b)
Zener diode
c)
PN junction
d)
All the above
28.
A __________ is a two lead semiconductor light source.
a)
Photo transistor
b)
LED
c)
Tunnel diode
d)
Resistor
29.
A photo diode is designed to operate in ___________
a)
Forward bias
b)
Reverse bias
c)
Both a & b
d)
None of the above
30.
The semiconductor device that converts light into current is ___________ .
a)
Photodiode
b)
Photo transistor
c)
Both a and b
d)
Resistor
100 %
