Electronics Engineering 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.

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