This is the Section 1 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 1 Module 21
1. The stage followed by the output complementary in Op-Amps functional block diagram
- level shifter
2. Transistor arrangement that operates like a Darlington but uses a combination of NPN and PNP transistor instead of both NPN.
- feedback pair
3. Distortion that is due to the inability of an amplifier to amplify equally well all the frequencies present at the input signal
- Amplitude Distortion
4. In a transformer, converts alternating emf to dc
- commutator
5. The frequency at which the open loop gain of an Op-Amp is 0.707 times at very low frequency
- break frequency
6. Op-Amps whose internal transistor biasing can be controlled externally are categories as
- Programmable Op-Amp
7. FM receiver intermediate frequency
- FM has high IF than AM receiver
8. Hierarchal structure, used in distributing, searching the internet
- Gopher
9. Good amplifier has
- very high input resistance
10. A CMOS semiconductor IC employs
- combination of N-channel and P-channel
11. An IGBT used in
- high voltage application
12. Transistor in cutoff and saturation region operates as
- switching
13. In electronic converter, what signal is mostly used to trigger the active device
- square wave
14. Produces an output frequency that can be varied by a control voltage
- VCO
15. Ratio of the amplifier between the input terminal and to the gain for the common mode signal component
- Common Mode Rejection Ratio
16. A 6 lead acid cell has an output voltage of
- 12 V
17. A 6 carbon zinc cell has an output voltage of
- 9 V
18. Dual in line or DIL package is designated as
- TO-116
19. First browser
- Mosaic
20. Birthplace of World Wide Web
- CERN
21. Difference between MOSFET and JFET
- JFET has PN junction
22. Difference between SCS and SCR
- it has two gate terminals
23. Bar code reader is an example of
- input device
24. Bar code is in ________ of the product
- UPC
25. A silver cadmium cell has a nominal voltage rating of
- 1.05 V
26. What do you call an amplifier that has a least distortion
- Class A
27. Which type of amplifier circuit has a Q-point exactly at cut off when there is no signal
- Class B
28. Q-point of Class C Amplifier
- Below cutoff
29. Q-point of Class AB Amplifier
- slightly above cutoff
30. Which type of amplifier circuit has a crossover distortion
- Class B
31. If an Op-Amp is used to amplify small ac signals, what parameter should you greatly consider to ensure better performance?
- Frequency Response
32. Distortion that is due to the inability of an amplifier to have the desire linear relation to the input
- Non Linear Distortion
33. Recorded message sent by telephone
- Voice mail
34. Full wave rectifier has a dc voltage of
- 0.636 Vmax
35. Processing transaction in group
- Batch Processing
36. File of stored web sites
- Cookie File
37. Can tie network together in a wide area
- Backbone
38. In self biased JFET, the gate is at
- 0V
39. Transformer is an efficient device because it is
- a static device
40. Zener diode, Zener Voltage of 3.6 V is in
- Zener Breakdown
41. Percentage of copper loss in a transformer
- 85 %
42. Transformer has a great loss of
- Copper Loss
43. Persuading people to get password
- Social Engineering
44. Common gate CG differs from Common source and common drain
- very low input resistance
45. Voltage generated in the armature winding
- ac
46. The magnitude of the Op-Amp input offset voltage before it can be classified as a low input offset voltage Op-Amp
- 0.2 mV
47. Computer crimes
- discovered accidentally
48. Monostable multivibrator
- resistor and capacitor combination
49. Transistor Configuration of a cascoded amplifier
- common emitter and common base
50. In paralleling generator, _______ is very important.
- phase angle
51. Balance Modulation also known as
- Suppressed Carrier Frequency
52. Instrumentation amplifier uses in
- high noise environment
53. Differential Amplifier, Single –Ended has
- One input is grounded and signal to the other
54. Double Ended Differential Amplifier has
- opposite polarity in both input
55. To increase the speed
- Parallel Processing
56. In both input is zero, ideally an Op-Amp has an output of
- Zero
57. If two wave have the same frequency and the same amplitude but opposite phase the composite wave is
- zero
58. Internal resistance of photodiode
- decrease in light intensity with reverse bias
59. Charge and discharge of RC network
- Relaxation Oscillation
60. What is meant by 20 dB/ decade roll off
- decrease by 10 dB per decade
61. Giving insulted word
- flaming
62. A 9V-Flat, has battery in series of
- 6
63. What is true about the external frequency compensation capacitor?
- the lower the value, the wider its bandwidth
64. What is the purpose of a level shifter in Op-Amp
- to set and/or adjust the output voltage to zero when input signal is zero
65. Primarily, Op-Amps are operated with bipolar power supply, however, we can also use polarity power supply by
- Generating a reference voltages to ground
66. Use in LAN’s, INTERNET PROTOCOL
- IP switch
67. Dirt in the commutator may cause
- excessive sparking
68. The approximate value of the bias current compensating resistor in op-amp circuits is
- Equal to the pallel combination of the input and feedback resistors
69. Damper winding are used in alternators to
- prevent hunting
70. Used in suddenly heavy loads for short duration
- Commulative compounded motor
71. A commulative compounded motor does not run on dangerous speed at light loads because of the presence of
- shunt winding
72. Motor with highest starting torque
- series motor
73. The frequency of the system were several alternators are parallel can be increase simultaneously by
- increasing the rpm of prime movers
74. The voltage of the system were several alternators are parallel can be increase simultaneously by
– increasing the field excitation
75. Synchronous motor has
- dc generator supply dc excitation rotating field
76. Low frequency response of amplifier uses
- coupling capacitor
77. Sequencing file transaction can be updated
- sorted
78. “what you are” criterion in computer system
- biometrics
79. High outgoing signal do not interfere on low incoming signal
- transponder
80. Safeguard against theft of data
- DES
81. Voltage gain of OTA
- transconductance and load resistor
82. Which of the following does not affect the capacitance of a capacitor
- the frequency
83. Bandwidth of amplifier
- critical frequency
84. Hashing to get and address is a process of aplying a formula in
- Key
85. Self excited tank circuit is divide with input and feedback by a capacitor
- colpitts oscillator
86. Changes personal computer as a terminal devices
- emulator
87. Use to connect personal computer and computer resources
- network
88. Centralize processing system but control its terminal
- a tele processing system
89. A RAID of duplicating data
- Data mirroring
90. Time required to position access arm
- seek time
91. A sabotage in certain condition
- bomb
92. A four layer device turn on
- if its exceed a forward breakover voltage
93. Drain current in the constant-current region increases when
- Gate to source bias voltage decrease
94. Most of the processing are done by the server
- Client/server
95. Triangular wave form passed a differentiator produces
- square waveform
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