This is the Section 2 Module 12 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 12
1. copper loss – greatest loss in transformer
2. collector – output in common-base
3. input in phase with output – more than two of the choices
4. X + 0, Y + 1: x(Y + Z) is – always 0
5. (Xc/R) = 1 - -45deg
6. thermal printer is good for – a person who always travel
7. when frequency decrease – Xc increase negatively
8. when frequency decrease – XL decrease
9. type of colpitts oscillator, have small capacitance added to two capacitors – clapp oscillator
10. when is collector the input – none of the choices
11. XL = R – 45deg
12. Square of imaginary number – never positive
13. Complex number – combination of real & imaginary
14. Why complex numbers are used - Provide a way to represent what happens in resistance-reactance impedance
15. When the dielectric of capacitor is changed – can’t be determined
16. Magnetic audio tape – tracks are parallel to the edges
17. Same amplitude, but signals cancel out – 180deg
18. Shortwaves – 55meters
19. Shortwaves range – 10 to 100 meters
20. 1 kilobyte – 1000bytes
21. converts useful data – CPU
22. brain – microprocessor
23. large storage device – hard drive
24. fast memory storage – flash drive
25. magnetic video tape – tracks are diagonal with the edges
26. magnetic tape
27. least application of IC – radio transmitter final amplifier
28. limit of IC density – small semiconductor atom
29. limitation of IS – small semiconductor atom
30. power factor is – ratio of true power over VA power
31. in power supply with 15Vdc output 240Vac input, which is not needed – uninterruptible power supply
32. gate of JFET has – high input impedance
33. Heaviside bridge – AC bridge - mutual inductance
34. For sensitivity meter control test instrument – linear-taper potentiometer
35. Illegal in ham radio – selling of used cars
36. X-axis in spectrum analyzer – frequency
37. Movement of holes – plus to minus
38. Holes are opposite the direction of electrons – carrier is transferred from atom to atom
39. Polarity of electron – negative
40. When the number of the turns in a coil increase, current will – decrease near to zero
41. When the number of the turns in a coil increases, reactance will – increase
42. Which type of capacitor is polarized – electrolytic
43. Commonly used as voltage reference in voltage regulators – zener diode
44. Which of the ff is used to have an inductance of 15H – ferromagnetic pot core
45. In an RLC circuit – net conductance & susceptance, convert to resistance & reactance
46. South east of GB plane – conductance and inductive susceptance
47. Purely resistive, phase difference is – zero
48. 40 + j30 - 40ohm and 30ohm inductive reactance
49. 300ohm, -30j – current leads voltage by a few degree
50. Direction finding device use to locate radio transmitter – radio locator
51. ability to operate in strong signal is a consequence of – dynamic range
52. stability – oscillator maintains at the frequency
53. type of LAN, each stores its own data – peer-to-peer LAN
54. pinch-off – in FET
55. saturation – voltage increase as it possibly can
56. vidicon camera – sensitivity
57. CRT – cathode
58. Tube type – bulky & heavy
59. RF choke – passes dc but not RF
60. Bipolar transistor – 3 semiconductor layer
61. In a household circuit, 234V has – three phases
62. In an autotransformer, the number of tapped winding is – 1
63. Center-tapped – balanced winding
64. Data sent in a single line – serial
65. Tuned PA – adjusted for max power
66. Tuned PA
67. Easy to use
68. ROM – data are easy to get, hard to put data in
69. Operational amplifier can be used in – all of the choices given
70. 4th harmonic of 800kHz – 3.2MHz
71. I2R loss is less – High voltage is used in long distance power transmission because:
72. GaAs – compound
73. Step-down transformer – primary voltage is greater than secondary
74. Modem – A/D converter
75. Cold welding uses – pressure
76. To reduce noise level – reduce temperature
77. Noise – increase the incoming signal
78. Broadband PA – generally easy to use
79. Noise level in wireless system – strong incoming signals are needed to overcome it
80. Increase in plate capacitor, capacitance of capacitor will not be affected by – the frequency(within reason)
81. Not an example of true power – power in a capacitor
82. In a transmission line, 3.5A 150Vac, true power is – meaningless because true power is not transmitted but dissipated
83. Loading in tuned PA – provides impedance match
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