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Electronics Engineering Review Materials: Section 2 Module 4

Electronics Review Materials: Section 2 Module 4

This is the Section 2 Module 4 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 4

Question Answer
1. In a non-inverting amplifier, the advantage of JFET in terms of control is that it is _____ rather than ______ DC, AC
2. Advantage of FET over BJT It has greater range of voltage
3. BiMos is Bipolar MOSFET
4. BiFET opamp has____ input impedance High
5. How many materials are there in a transistor 3
6. Which of the following has 4 terminals SCS
7. What component is used as reference voltages Zener diode
8. What is the typical Q of a crystal 20,000
9. The resonant frequency of a crystal depends on the Size and thickness of the material
10. In a motor, regardless of AC or DC, what is its source Prime mover
11. Sallen-Key is also called VCVS
12. Maximum forward voltage of a Zener diode 600mV
13. What class of amplifier is used in radio and communications Class C
14. Maximum efficiency of transformer coupled Class A amplifier 50%
15. A Repulsion motor has a/an Commutator
16. What configuration has the lowest input impedance Common-Base
17. What provides a relatively flat passband Inverse Chebyshev
18. MOSFET has how many terminals 3 or 4
19. Which of the following has no cathode? TRIAC
20. The advantage of a universal motor is that it can work both in____ AC and DC
21. What is the reason why a universal motor is widely used? Because it has high kW/kg ratio
22. A commutator conveys Induced AC to DC
23. Laminating of core eliminates/reduces Eddy current
24. LASCR maximum current is 3A
25. Fastest turn off time LASCR
26. Monostable 555 IC has ___stable state 1
27. LM7812 IC outputs how many volts 12V
28. 1n4001 internal resistance 0.23 ohms
29. Buck switch increases Duty cycle
30. When Q is near the center of loadline, clipping will occur in the Negative cycle of the output
31. In a wave winding, the number of times it has to turn before returning to its starting point. 2 times/twice
32. In an ideal ammeter, half scale deflection happens at 50% power
33. To invert the direction of a motor, the _____winding is also inverted Starting
34. When the load resistance is short circuited, the voltage drop would be 0V
35. As the maximum voltage goes to 0, the current goes to Infinity
36. Unipolar devices have how many injected carriers going into the region 1
37. Which of the following components has a negative resistance region UJT
38. In ICVS, if there is no output, then The feedback resistance is shorted
39. If the motor speed is slower, then it means that it has Worn bearings
40. In an emitter bias, the voltage at the emitter resistor is the voltage between the emitter and the ___________ Ground
41. A 339IC has how many comparator 4
42. If the motor is disconnected from the source, what keeps it running? Running winding
43. PUT has how many terminals 3
44. What instrument is used to view the harmonics of a signal? Spectrum analyzer
45. The graph of emitter-collector voltage versus base-emitter voltage applies to Emitter diode
46. When there is a small collector current and the base current is zero, the leakage from the collector comes from the Collector diode
47. Which class of amplifiers has the least efficiency Class A
48. Isolates the input from the output Optocoupler
49. The Q of a Sallen-Key filter at the second stage depends on the Voltage gain
50. In the Arsonval movement meter, you can convert it into an audio frequency AC ammeter by adding a Rectifier
51. Which of the following operates only in its reverse biased condition Phototransistor
52. An op-amp zero crossing detector without hysteresis has No feedback
53. It determines the cut-off frequency of an inverting amplifier Compensating capacitor
54. Which of the following has the lowest resistance Series Field
55. In BJT amplifiers, the _______ gain ranges from less than 1 up to 100 Current
56. The starting winding in a single phase motor is seen in the Stator
57. The armature coils are not in axial but skewed. The reason why it is still used even if it is hard to wind the coil is because To quiet its operation
58. Howland Current produces A unidirectional single-ended load current
59. What is the operating frequency of a capacitor in parallel in an ideal diode Very High frequency
60. When the EMOSFET is operated in the cut-off and ohmic region, it acts as a Switching device
61. The open loop gain of a non-inverting amplifier is equal to the Feedback resistance divided by its input resistance
62. What happens to the starting capacitor if the centrifugal switch is not triggered to open Capacitor failure
63. In a permanent single phase capacitor motor, it has no Centrifugal switch
64. When the graph of the drain current is steep, the output impedance is High
65. Donor atoms has ____valence electrons 5
66. A 339IC acts as a Comparator
67. When an armature coil sides are pole-pitch apart Full-pitch
68. Single phase motor, _____ Cannot self excite
69. In compound generators, which has the lowest input impedance Starting winding
70. The gate voltage in dc analysis is 0V
71. In n-channel JFETs, when the gate voltage becomes very negative, the current path Shrinks
72. To improve the high frequency response of an op-amp, which of the following would you employ, Shortening of the leads
73. Which are used in manufacturing Tunnel Diodes Gallium and germanium
74. In BJTs, the base voltage leads the input voltage by an amount of ___________ when the operating frequency is higher than the cut-off frequency About 90 degrees
75. Which is used to protect during excessive load voltage Crowbar
76. When the load is shorted, the pass transistor produces the least power dissipation when you use Foldback limiting
77. In dual mode npn transistors, which side is the emitter Either sides
78.  

Complete List of Section 2 Modules in Electronics (Q&A)

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