Electronics Engineering Review Materials: Section 2 Module 5

Electronics Review Materials: Section 2 Module 5

This is the Section 2 Module 5 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 5

Question Answer
1. The charge of a neutral carbon atom 0
2. What is the purpose of doping To give a semiconductor material certain properties
3. The stray-wiring capacitance only affects at Upper cut-off frequency
4. The collector drain current is Total current of the dc source
5. The difference in the input bias currents Input Offset Current
6. If the base resistance is open, the q point is in the lower end of load line
7. The ripple factor for a full wave rectifier 0.48
8. does the current conduct in a class B amplifier Half of the input cycle
9. If an electron has a unit charge of negative 1, the hole has a unit charge of +1
10. Most commonly used LC oscillator Colpitts oscillator
11. Eddy Current aids to The core loss
12. Which provides the largest gain of the three configurations Common emitter
13. The differential voltage happens at the what stage of the op-amp First stage
14. The center-tap is commonly seen in the Balanced winding
15. The series voltage regulator is much efficient than the shunt voltage regulator since It turns on and off the pass transistor
16. Which impurity is added to produce a P-Type Acceptors
17. The output of a relaxation oscillator Square Wave
18. In a mesh, the algebraic sum of voltages entering and leaving a node is zero Kirchoff’s Second Law
19. Which of the following regarding the average voltage and rms voltage is true? The rms voltage is always greater than the average voltage
20. What is the output voltage of the 78*** regulators Positive
21. How are EMOSFET triggered? Threshold Voltage
22. The Thevenin Resistance is equal to The internal resistance of a norton circuit
23. A stable circuit with a variety of amplifier impedance uses Optoisolator
24. Breakdown voltage of a zener diode is Approximately constant
25. RC snubber protects SCR against False triggering
26. A graphic equalizer is a form of Tone control
27. In regulators, the device that controls the amount of current/voltage/power Control element
28. Clock periods are measured from Similar points on the clock waveform
29. A kelvin electrostatic voltmeter uses Fluid friction
30. Input impedance of JFET is Infinity
31. Efficiency of a linear regulator is high when Headroom voltage is low
32. In a buck regulator, the output voltage is filtered with a Capacitor-input filter
33. When the two input terminals of a differential amplifier are grounded, The output error voltage exist
34. Unity gain frequency of a 741C IC is 1MHz
35. Dropout voltage of IC 2V
36. The cut-off frequency is equal to the unity gain divided by Closed loop voltage gain
37. An elliptical approximation has Rippled stopband
38. In a shift register, a clock signal indicates When to shift a bit of data from input of a flipflop to output
39. To improve the DC output voltage of a DC supply Filter capacitor may be installed
40. To service a power supply which you are not familiar with, Leave it alone and have a professional work on it
41. Efficiency of a voltage regulator is high when Little power is wasted
42. The change in input offset voltage due to change in temperature is Input offset voltage drift
43. Susceptance and conductance adds to form Admittance
44. An EMOSFET can be recognized as A broken vertical line inside a circle
45. Complex number are used in impedance since It provides a way to represent what happens in the resistance-reactance circuits
46. Bandstop circuits are also called Notch filters
47. Selenium works well in Photocells
48. Which does not increase loss in transmission lines Reducing power output of the source
49. In op-amp, the input offset voltage is represented as a Larger than open loop input impedance
50. Closed loop input impedance of a VCVS Battery
51. In npn transistors, the electrons in the emitter have enough energy to overcome the barrier potential of the base to emitter junction
52. the base to emitter voltage of an ideal transistor is 0
53. Blown fuse indicator uses Light emitting diode
54. Inductive susceptance is measured in Siemens
55. It has a negative resistance region Tunnel diode
56. ICVS amplifier circuits approximates an ideal Current to voltage converter
57. Most power FETS are used in High current applications
58. Ferromagnetic coils are not good in RF oscillators because Air core coils have better thermal stability
59. In a TTL, when Schottky diode is added to the base to collector terminal, it results to a Schottky TTL. A schottky TTL Increases switching speed
60. An IMPATT diode are used in Microwave oscillators
61. PMOS are supplied with voltage up to 24V
62. If you need exceptionally good ripple filtering, the best approach is to use A capacitor/choke sections
63. To prevent damage to a multirange ammeter, Ayrton shunt is used
64. The voltage at emitter is 0.7 less than the Base voltage
65. The simplest way of protecting power supplies from reverse polarity is Reverse biased diodes
66. Bandwidth of Class C amplifier decreases when Q increases
67. If you need a winding L of 1.5H we use, Ferromagnetic pot core
68. Each degree rise in junction temperature decreases barrier potential by 2mV
69. For ac amplifiers, what parameter affects its performance Slew rate and frequency response
70. A comparator with a trip point of zero is also called Zero-crossing detector
71. A zener diode is A constant voltage device
72. What instrument having recognized with permanent values that is used as reference Standard Instruments
73. In a parallel RLC circuit, and you need to find the complex impedance, Find the net conductance and susceptance then convert to its resistance and reactance then add it together as R+jx
74. Increase of line voltage in a power supply Decreases the efficiency
75. A Colpitts oscillator can be recognized by A split capacitor in the tuned circuit
76. A wien-bridge oscillator is also called a Notch filter
77. A VCVS amplifier has no output voltage, what is the problem Shorted load resistance
78. In an N-channel JFET, pinchoff occurs when the gate bias is Very negative
79. Majority carriers in the emitter of a PNP transistor Holes
80. The best filter for a power supply A capacitor in parallel and a choke in series
81. How will you handle unsaved inputs in a logic gate Pull them down or up depending on the circuit function
82. If the emitter resistance is doubled with TSEB, the collector current will Drop in half
83. If a CE stage is directly coupled to an emitter follower, how many coupling capacitors are there between the 2 stages? 0
84. The toroid core is better than the solenoid because It confines the magnetic flux
85. If a JFET is used in an AGC, it acts as a Voltage-controlled resistor
86. To decrease the distortion in amplified signals, you must increase the Emitter feedback resistor
87. The zero-adjust control knob in an analog ammeter is for Compensating the internal battery
88. Without current limiting, when the load resistor is shorted It destroys diodes and transistors
89. Instruments used to measure exceeding the mercury thermometer Pyrometer
90. Which of the following has no insertion error Clamp-meter
91. The electrons in NPN transistors do not recombine because They have a long lifetime
92. In analyzing emitter-based configurations, the first step is to obtain Base current
93. To obtain a butterworth response in an 8th order filter, the stages must have Staggered Qs
94. In flip-flop arrangements, the first receives its input in the positive cycle and the other receives its input from the output of the first in the negative cycle Master/slave Flip-flops
95. If you increase the internal temperature in power FETs, The drain current decreases
96. If the IC linear regulator is a few inches between the filter capacitor, the IC will oscillate unless Use a bypass capacitor in the input
97. If the input of the emitter-follower increases the output will be Clipped
98. A non-inverting amplifier has A high closed-loop input impedance
99. A group of oscillators forming a loop Ring counter

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

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