ELECTRON DEVICES AND CIRCUITS
PUZZLES :
1.Choose the Symbol of PN junction diode:-
A.
B.
C.
2.PN junction diode acts as ----------------?
CLUE: Rectifiers
3.When the negative terminal is connected to positive terminal and when the positive
terminal is connected to negative terminal then it is called as----------- bias
CLUE :
4.Diode acts As a -----------
CLUE
:
5.Conversion of
Is called as ---------S.Saranya AP/ECE SNS college of ENgineering
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6.Type of the Diode
7.The ratio of rms value of Ac component to Dc component in the output is called as
A.
B
C.
8.
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9.The need for a center tapped transformer in Full wave rectifier is eliminated in -------
CLUE:
10. Peak factor of half wave rectifier is
A.
B.
C.
11.Find the odd man out
a. Inductor filter b. capacitor filter c. Rc filter
12.which works under the phenomena of electroluminescence
CLUE:
13.
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14.
15.Identify the characteristics of the figure:
16.Threshold voltage for germanium
A.
B.
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C.
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17.In order to make distortion free circuit and to the transistor to work in active region
desired que point .What it means?
18. Work function is the maximum energy required by the fastest electron at 0 K to escape
from the metal surface.
A.True
B.False
19.-------- through takes place at a fixed voltage between collector and base and is not
dependent on circuit configuration
CLUE:
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20. 2) BJT-terminal Function
Across
1. ACTS AS AMPLIFIER
Down
1. ACTS AS BUFFER
21.
22.Multiplication Factor Is Denoted By?
A.
B.
C.
D.
23.
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24.Reverse saturation current --------for every 10 degree increase in temperature????
Clue:
25. FIND THE WORDS BELOW:
26.Identify the symbol:
27.Expand CCD
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28.Expand?
29.Match The Following:
a.GTO--------light activated scr
b.TRIAC-----gate turn off
c.LASCR-----triode A.C switch
30.Range Of Intrinsic Stand Off Ratio???
A.
B.
0.56 to .75
C.
2.555 to4.66
2.66 to 3.77
31.
32.A portion of input signal without distorting the remaining part of alternative waveforms
is
STARTS WITH
ends with
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33.
34.-------- Shifts a signal to different DC levels
CLUE:
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35.
36.Which circuit is astable multivibrators?
a.
b.
37. ZENER DIODE AS A REGULATOR
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ACROSS:
2. Two types of regulation are----------(2)regulation and load regulation
DOWN:
1. Maximum current will flow through the zener diode during -------------------(1)
3.The purpose of a ................is to maintain a constant voltage across a load regardless of
variations in the applied input voltage and variations in the load current.(3)
38.-------- multivibrator is used as memory element in Shift register
-------------------------------39. ZENER DIODE CHARACTERISTICS
Decrypt the encrypted term.
Clue:
This mechanism is caused because of acceleration of charges due to large electric field in the
depletion region which further collides with the atoms in the silicon lattice causing dislodging of
atoms.
40.Among the configuration which one is the best
CLUE:
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41.Transistor has -------- types of configuration
A.
B.
C.
42.Find the below word
43.Transistor acts as a ---------------------
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44.Common base has a current gain of
a
b.
c.
45.
46
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47.Find the words
48.Expand IGBT
49.Find the odd man out
a. CE configuration b. CC configuration
c. ZC configuration
50.Common emitter is ------------- doped
CLUE:
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51)
When a snowball rolls down a snowy hill, it picks up snow, which causes it to roll
faster. The result is that the snowball will pick up more snow and roll even faster.
This scenario would best be described as:
a)
b)
52) The audio amplifier response curve illustrated in Fig. 3shows which of the following
problems?
a) Frequency distortion
b) Amplitude distortion
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53) At what phase shift is the magnitude of βA at its maximum in the Nyquist plot?
54) The most commonly used semiconductor material is
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55) In which of these is reverse recovery time nearly zero?
56) The number of doped regions in PIN diode is
57) Which of the following is used for generating time varying waveforms
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58) The unit of trans conductance is
59) The voltage at which avalanche occurs is
Clue:
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60) In a bipolar transistor the base collector junction has-------------bias
Clue:
a)
b)
61) Free electrons exist in---------band
Clue:
62) The figure represents a --------
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63)
64)
65)
66) Find the following word
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67) Encircle the words
68) Measure of the ability of the circuit to increase the power or amplitude
is _________
Clue:
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69) _________ amplifier is a two port network constructed from a series of
amplifiers
Clue:
70) The BJT is a ________ controlled device
Clue:
71) Find the following words
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72) _________ amplifier is a dc coupled high gain electronic voltage amplifier with a
differential input
Clue:
73)
74)
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75) Find the words:
76)
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77)
78) Crossword puzzle:
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79)
80)
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81)
82)
83) ________ Mega ohm is the typical value for the input impedance Zi for JFETs?
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84) MOSFET digital switching is used to produce which digital gates
Clue:
(Opposite output) gates
(Complementary of addition) gate
(Multiplier) gate
85) For a common-emitter amplifier, the purpose of the emitter bypass capacitor is
to ___________ ___________ gain
clue:
86) The total voltage gain of a multistage amplifier is the product of the individual stage
gains.
Ans: True/false
87) When transistors are used in digital circuits they usually operate in the saturation and
_______ region
Clue:
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88) If the input to a comparator is a sine wave, the output is a
Clue:
89) Isolating a problem in a circuit is called as
90) Form the word:
91) An instrument or a circuit consisting of four resistors or their equivalent in a seriesparallel arrangement, used to determine the value of an unknown resistance when the
other three resistances are known.
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92) The difference in potential between two points caused by current flow through a
component.
93) A broad classification of semiconductor devices used as electronic switches. Examples
include diacs, SCRs, and triacs.
94) Electromechanical device that use electromagnetism to produce a mechanical
operation.
Clue:
95) A group of eight binary bits, commonly used to represent digital data.
Clue:
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96) A cylindrical arrangement of insulated metal bars connected to the armature coils of a
direct-current electric motor or generator, providing a unidirectional current from the
generator or a reversal of current into the coils of the motor.
97) _______ law of electromagnetic induction which states that an induced voltage will
have a polarity that opposes the current change that produced it.
98) What is the resistor value in the given circuit?
a)
b)
c)
d)
1 k ohm
2 k ohm
3 k ohm
4 k ohm
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99) What does a Hall Effect sensor sense?
100) Which is the DIAC?
a)
b)
c)
d)
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