This is the Section 2 Module 21 of the compiled Electronics Review Materials taken from different sources including but not limited to Electronics books, past Board Exams Questions, Journals and the Internet. This particular reviewer in Electronics Engineering has random Questions and Answers in random topics. Make sure to familiarize each questions to increase the chance of passing the ECE Board Exam.
Electronics Engineering Reviewers: Section 2 Module 21
1. The unit that transforms data into information
Wand Reader
2. In a series RC circuit, where R is equal to Xc, the phase angle is
-45 degrees
3. The collector feedback bias is
based on the principle of negative feedback
4. The speed in which the data can find a data
Access time
5. Motor action tends to produce motion
Stronger field towards the weaker field
6. Bias current compensation
produces output error voltage
7. Silicon is widely used over germanium because of several advantages, what is the most significant advantage?
Low lead current
8. A laminated iron core transformer has reduced eddy current losses because
The laminations are isolated from each other
9. In electromagnetism, what law determines the amount of induced voltage
Faraday’s law
10. When applying Kirchhoff's current law,
consider all currents flowing into a branch point positive and all currents and away from that point negative
11. In a program, drawing a flowchart is a means to
Plan the solution
12. The presence of both data and scalated instructions
Encapsulation
13. What is the law whereby the force of attraction and repulsion between poles is inversely proportional to the square root of the distance between them
Coulomb’s second law
14. In a common mode, an identical signal
appears in both input
15. When current in a conductor increases, Lenz’ law states that the self- induced potential will
Produce current opposite to the increasing current
16. Assigning more sectors to outer disk tracks
Zone recording
17. In the forward blocking region, the SCR is
In the off state
18. The physical motion resulting from the forces of two magnetic fields is called
Motor action
19. The output of the am detector goes to the
Audio amplifier
20. For operation as an amplifier, the base of an NBP transistor must be
Positive with respect to the emitter
21. If the north pole of a permanent magnet is placed near the soft iron, what is the polarity of the nearest induced pole
South Pole
22. A cascode amplifier consists of
a CS and a CG amplifier
23. In a transistor amplifier, if the base emitter junction is open, the collector voltage is
Vcc
24. The geographic north pole of the earth has
South magnetic polarity
25. Two dissimilar networks can be connected by a
Gateway
26. A PN junction is formed by
The boundary of a p type and a n type material
27. At the upper critical frequency, the peak output voltage of a certain amplifier is 10V. The peak voltage in the mid range of the amplifier is
Transistor capacitances
28. The ability to return the change disc record into its original form is called
Updating and
29. If one of the diodes in a bridge full wave rectifier opens, the output is
A half wave rectified voltage
30. In the rectifier circuit, if the secondary winding in the transformer opens, the output is
0V
31. In developing a program, documentation should be done
Throughout the process
32. The final output of an AM demodulator is the
Audio signal
33. The channel of a JFET is between the
Drain and source
34. The purpose of a pentavalent impurity is to
Increase the number of free electrons
35. Another name for collaborative software
Groupware
36. Which of the following metals below is the most least conductor of electricity
Silver
37. In a series RL circuit where XL is equal to R, the phase angle is
45 degrees
38. For an op-amp with negative feedback, the output is
Fed back tot he inverting input
39. The weakest link in any computer system
The people in it
40. When a small voltage is generated across the width of the conductor carrying current in an external magnetic field, the effect is called
The hall effect
41. Registers that collect the result of computations are
Accumulators
42. The measured voltage across an unloaded secondary of a transformer is usually
Five to ten percent higher than the rated secondary voltage
43. In an Am receiver system, the audio amplifier
Has a typical bandwidth of 3kHz to 15kHz
Follows the detector
Drives the speaker
All choices are correct
44. Permission for an organization to make copies for a certain software
Side License
45. Cells can be connected in series parallel
to increase the voltage and current capacity above that of a single cell
46. Which is not another name for memory
Secondary storage
47. When low pass filters are cascaded,
the roll of rate increases
48. The disadvantages of base bias is that
It is too beta dependent
49. Soft copy refers to
Screen output
50. A plastic film capacitor whose coded value is 833m measures 0.025uF when tested with a capacitor inductor analyzer, the measured capacitance is
Slightly out of tolerance
51. 5 D-sized alkaline cells in series have a combined voltage of
7.5 V
52. In all cases of electromagnetic induction, the current setup by an induced voltage tends to create flux whose direction opposes any change in the existing flux, this law is called.
Lenz law
53. A fourth generation language used for database retrieval
QUERY Language
54. A material that becomes strongly magnetized in the same direction has a magnetizing field is classified as
Ferromagnetic
55. The dividing line for a coupling capacitor at a specific frequency can be taken as
Xc = 1/10th of the series resistance
56. The ideal DC output voltage of a capacitor input filter is equal to
The peak value of the rectified voltage
57. For an AC waveform, the period refers to
The length of time required to complete one cycle
58. The circular area of round wire doubles for
Every 3 gauge sizes
59. The constant current region of a FET lies between
Pinch off and breakdown
60. The capacitive reactance of a capacitor is
Inversely proportional tot he frequency
61. Another name for packing software is
Commercial
62. For a moving coil meter movement, Im is
The amount of current needed in the moving coil to produce full scale deflection pointer of the meter
63. Reversal flow of current in a circuit
Reverses the magnetic polarity
64. What law in electronics were an induced current will be in such a direction that its own magnetic field will oppose the magnetic field that produces the same
Lenz law
65. A constant current source
Supplies constant current in a wide load resistances and has very high internal resistance
66. In an ideal integrator, the feedback element is a
Capacitor
67. One microweber equals
One hundred maxwells
68. The class D amplifier uses
Pulse Width Modulation
69. A bundle of basic software designed to works together
Suite
70. When a lowpass and high pass filter are cascaded to get a bandpass filter, a critical frequency of a low pass filter must be
Greater than the critical frequency of the high pass filter
71. A certain common emitter amplifier has a voltage gain of 100. If the emitter bypass capacitor is removed,
the voltage gain will decrease.
72. When demagnetized properly by applying an AC field gradually reduce it to 0 is called
The gaussian
73. Common types of thyristors includes
DIACS and TRIACS
74. Compare the phase angle between two waveforms, both have
The same frequency
75. Computer users can increase hard disk capacity with
Removable hard disk cartridge
76. If you are looking for both good voltage gain and a high input resistance, you must use a
CS amplifier
77. The disc storage that uses both a magnet and a laser beam
Magneto optical
78. The bias condition for a transistor to be used as a linear amplifier is called
Forward reverse
79. In a series circuit, individual resistor voltage drop is
Proportional to the series resistance values
80. When the voltage drop of an amplifier is increased,
the bandwidth decreases
81. In transistors, class B amplifier bias
At midpoint of the load line
82. For a relay, the holding current is defined as
The minimum amount of relay coil current required to keep a relay energized
83. The input resistance of a common base amplifier is
Very low
84. One ampere turn is equivalent to
1.206 gilberts
85. 60 hz sinusoidal voltage is applied to the input of half wave rectifier, the output frequency is
60 hz
86. In electromagnetism, what law that determines the polarity of induced voltage
Lenz law
87. In every increase of 10 degree celcius operating temperature of a diode which results to its reversal current to
Double
88. What is the efficiency of power transfer of properly matched load conditions
50%
89. If there is an internal opening between the drain and source of the CS amplifier, the drain voltage is equal to
VDD
90. FM modulation is achieved by
Mixing the carrier signal with the modulating signal
91. Common mode gain is
Very low
92. Holes in an N type semiconductor are
Minority carriers that are thermally produced
93. For an analog VOM with the mirror along the printed scale, the meter is read when
the pointer hits the mirror reflection and appears as one
94. If the control voltage to a VCO increases,
the output frequency increases
95. A small signal amplifier,
uses only a small portion of its load line
96. When a receiver is tuned to one frequency to another,
The IF stays the same
97. A TLL maintains lock by comparing
The phase of two signals
98. Transistor in a Class C amplifier conducts for
A very small percentage of the input cycle
99. In a magnetic circuit, a flux that is away from the leak path is called
Leakage Flux
100. In an AM receiver, the IF amplifier is tuned to
455 kHz
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