This is the Section 2 Module 11 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 11
1. 117V has peak value of
– 165V
2. 117V has peak to peak value of
– 331V
3. red, red, red, gold
2.2Kohm
4. gray, red, yellow
620Kohm
5. 45 Vdc connected to 117 Vac
210 to 120V
6. Vdc connected to utility Vac
– pulsating dc
7. Given 1 watt 1000ohms resistors, to produce 7 watts
– 4 resistors in series, 4 sets in parallel
8. Phase difference
– phase angle
9. Distance of vector from center
– magnitude
10. Hayleigh -
11. Joshi effect - The change in the current passing through a gas or vapor when the gas or vapor is irradiated with visible light.
12. Grosh law – processing power of computer is proportional to square of cost
13. 180 degrees – if you add or subtract few degrees the wave will be inverted
14. 360 degrees - if you add or subtract few degrees the wave will still be the same
15. Pyranometer – measures radiation in the sky
16. primitive way of measuring current
– galvanometer
17. VU meter is never used for measuring
- Energy
18. Proton – atomic number
19. Atomic weight – proton + neutron
20. Oscilloscope can’t be used to indicate
– energy
21. Ohm – amount of opposition to current
22. Number of NAND to form OR gate
3
23. Three times increase in power level has increase of
5dB
24. Unit of sound level
– decibel
25. Current – rate of flow of electron
26. Static – if _???___ charges without current passing
27. Increase in plate – increase in capacitance
28. Decrease in spacing – increase in capacitance
29. Volume controller of CD player – logarithmic-taper potentiometer
30. Metal-film resistor – has less reactance than wire-wound
31. Wire-wound resistor – high power dc circuit
32. Carbon-film resistor – non-reactive
33. Not characteristic of mica capacitor – small size
34. Watt-hour – watt being used at a time
35. Length of a cycle
– period
36. Advantage of toroid over solenoid – concentrated at the core
37. Bulb connected in series, when shorted – current will increase
38. Move up – increase inductance
39. Insulator to conductor – ionizing
40. Best conductor – copper
41. Weak conductor – air
42. Air as dielectric – effective efficiency
43. Value of R in voltage divider – as small as the power supply allow
44. Biasing an amplifier circuit – can be done using voltage divider circuit
45. Max. voltage across voltage divider –equals the power supply
46. Gen. characteristic of voltmeter – large internal resistance
47. Which will not cause major error in ohmmeter reading – small change in resistance
48. Half-wave rectifier – half of wave is cut
49. Output of half-wave rectifier – effective value less than original
50. Peak voltage – greater than or equal to the average
51. Measuring device for magnetic field strength – magnetometer
52. NICAD – more than one of the choices
53. Lithium usually used in – microcomputer memory backup
54. Photovoltaic – light
55. Thermocouple – gets warm when current flows through it
56. Chemical compound – two or more atom
57. Permanent magnet – ferromagnetic
58. Does not affect inductance – diameter of wire
59. Opposite phase, same amplitude – zero
60. Twice voltage, half resistance – four times greater current
61. 15V
62. same phase, same amplitude – sum of two signals
63. will change in ac not in dc – frequency
64. wire-wound resistor is used for – large power dissipation
65. advantage of rheostat over potentiometer – can handle large current
66. in spectrum analyzer, an ac signal w/ one freq looks – single pip
67. temperature coefficient
68. a battery supplying constant current until it dies has – flat discharge curve
69. capacitor stores – electric field
70. small inductance – stores & releases quickly
71. movement in vector diagram – rotating counter-clockwise
72. sinewave
73. intensity of light is a measure of – current
74. high recording motor – video
75. advantage of magnetic disk over magnetic tape – fast retrieval & access
76. relay – normally open
77. atomic number – number of protons
78. wiring diagram vs. schematic – components in wiring diagram have values
79. a certain current in a galvanometer cause 20deg deflection, when current is doubled needle deflection will – increase
80. a utility meter readout indicates – energy
81. carbon-composition resistor – comparatively non-reactive
82. fill in the blanks – power
83. device that reverses magnetic field polarity to keep a dc motor rotating – commutator
84. an application in which an analog meter is preferred – a signal strength indicator in a radio receiver
85. which of the ff. is not a gen. characteristic of an ac wave – electrons always flow in the same direction
86. 1/360
87. utility meter measures – energy
88. watt-hour meter measures – energy
89. VU meter is never used to measure – energy
90. Which is true for dc electromagnet – has constant polarity
91. Webber - ______ effect
92. Wilson Effect –
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