This is the Section 1 Module 1 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 1
1. In a P-type material, which is the minority carrier?
- electron
2. What is the most widely used semiconductor material?
- silicon
3. Why is Gallium Arsenide is not commonly used as a semiconductor material?
- expensive
4. When there is a flow of current, the diode
- is forward with respect to the cathode
5. What element after input the output remain
- latch
6. A bulb is connected in parallel is blown out
- connect or used of fuse or breaker
7. What is the value of watt in horse power
- 746 hp
8. The proportion of energy transmitted by that object which can be transferred to another object. It is an alternating current waveform
- form factor
9. What primary cell which the electrodes are zinc and carbon with an acidic paste between them that serve as the electrolytic?
- Le Clanche cell
10. What kind of battery in which the electrochemical is not reversible?
- primary cell
11. What is equals to 270 degrees
- lags signal by 90 degrees
12. In JFET, what element is similar to a garden hose
- channel
13. A bleeder is place parallel in the circuit for the purpose of discharging of what element
- capacitor
14. Where do we used bypass capacitor
- feedback
15. FTP stands for
- File Transfer Protocol
16. X is low, what is X NAND Y
- low
17. Drain current is maximum
- pinch off
18. CMOS stands for
- Complementary Metal Oxide Semiconductor
19. What IC is commonly used in computers
- 78XXX
20. Dual in line or DIL package are designated as
- TO-116
21. When a transformer is subjected to high frequency
- high core loss
22. What is the condition of maximum efficiency
- core loss is equal to constant loss
23. R/Z
- power factor
24. Least torque
- DC shunt
25. Diode used in microwave transmitters
- IMFATT diode
26. Advantage of magnetic disk to magnetic tape
- faster retrieval
27. When the ratio of transformer is quadrupled
- 1:16
28. Advantages of JK to RS flip flop
- there is always a predictable output
29. Power output divided by driven power
- maximum power efficiency
30. Disadvantage of transformer coupling to capacitor coupling
- expensive
31. Angle of three phase
- 120 degrees
32. Where do we used large transformers
- television PA
33. IC used in computer
- common IC
34. Push pull amplifier
- class B
35. Advantage of vacuum tube
- can withstand high current
36. The fuse with nothing but a straight wire inside is probably
- a quick break type
37. A fuse is blown out, if the fuse is change by a much lower current, what will happen
- blows out immediately
38. NMOS – CMOS
- low drift
39. MOS disadvantage
- can be damage by static discharge
40. System analysis
- System Architecture
41. Connection in LAN
- network interface card
42. The output and inputs of datas
- ports
43. Most susceptible to noise
- Transistor transistor logic, TTL
44. Why carbon brush is used instead of copper
- less arcing
45. Step up transformer
- small primary, large secondary windings
46. Step down transformer
- large primary, small secondary
47. Accessible but not written
- ROM
48. A flip flop which inputs and outputs are coupled together
- clocked
49. Beat frequency oscillator
- detecting CW
50. Measuring instrument which measure current without cutting off the source
- clamped probe
51. Instrument or device used to measure radiation in the atmosphere
- pyranometer
52. What damping method is generally used in dynamometers?
- air friction
53. Characteristic of FET
- negative source
54. Negative feedback
- reduce gain
55.
- gain equals to 1
56. Where LED usually used
- digital display
57. The three terminal voltage regulators, such as 78XXX series has a typical current rating of 1.5 amperes. If a high current is required, say 30 amperes, how you make modifications for this regulator in order to provide the required current?
- by the use of external pass transistor
58. Moving permanent magnet device
- moving magnet instrument
59. No break power transfer (NBPT)
- the transformer in line is not remove then the other transformer is connected
60. Break power transfer (BPT)
- transformer in line is disconnected first before connecting the other transformer
61. Fast moving animation
- fast interlaced monitor
62. Excessive current
- used of crowbar
63. Active devices used in switching regulators may experience large over-currents during conduction (turn-on-state) and large over-voltages during turn-off. These excessive currents and voltages may cause distraction or damage of the active devices. How do we protect it?
- by installing a snubber circuit
64. NMOS can be interlaced to CMOS by providing a
- pull-up resistor
65. Time domain frequency display
- oscilloscope
66. Ratio of magnetic flux in secondary to primary coil
- coefficient of coupling
67. Minimizing the capacitance in both ends of transformer
- by placing toroidal in both transformer winding
68. Difference of two arithmetic numbers
- deviation
69. Crystal oscillator on VCO
- placing a small variable capacitor
70. Parameters are use in oscillation, except
- current in the line
71. All of this are parameters that prevent on oscillating, except
- in phase with current
72. Connection of different computers
- gateway
73. Graph of JFET
- near the center
74. Active devices used in switching regulators may experience large over-currents during conduction(turn-on-state) and a large over-voltages during turn-off. These excessive currents and voltages may cause distraction or damage of the active devices. How do we protect it?
- by installing a snubber circuit
75. Responsible for SCR firing
- trigger circuit
76. Operating at exactly cutoff or saturation
- class B
77. Negative feedback
- not used in oscillators
78. Used in oscillators
- varactor
79. Core type transformer
- shorter magnetic field
80. RF amplifier is best used of core type
- No! air core type is best for RF amplifier
81. Limit the frequency in the PN junction
- junction capacitance
82. The output has reactance’s
- the impedances is mismatch, no matter what
83. Source follower
- negative drain current with respect to source
84. Input of 1 to be out of 10
- decade scale
85. Limiting distortions, like humming in radio
- by regulation
86. Power of the reactance
- imaginary
87. Beat frequency oscillator
- detecting CW
88. Crystal oscillator on VCO
- by placing a small variable capacitor
89. Device use to differentiate different values
- comparator
90. When JFET is bias, what happen to the channel
- skews
91. Advantage of crystal controlled oscillator on VFO
- low drift
92. Shell method
- provide maximum coupling
93. Removing bypass capacitor will result
- decrease in gain
94. JFET characteristic curve is
- drain current with respect to source voltage
95. Impedance of zener diode
- zener impedance
96. To prevent MOSFET from being damage
- all of the above
97. Voltage doupler
- for circuits requiring low current but high voltage
98. Capacitance parameter in computing capacitor
- frequency(within reason)
99. Using a battery or power cells is expensive, the common solution is by the use of household voltage
- Rectification
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