Electronics Engineering Review Materials: Section 1 Module 29

This is the Section 1 Module 29 of the compiled Electronics Review Materials taken from different sources including 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 1 Module 29

Items	QUESTIONS:	ANSWERS:
1	A nonpolarizing primary wet cell with zinc (negative) and copper (positive) electrodes	Daniell cell
2	Output voltage of Daniell cell	1.1 V
3	Dichromate cell electrodes	Carbon and zinc
4	For an alkaline cell, the negative electrode is made from zinc and the positive electrode is made of	Manganese dioxide
5	Transformer in a power supply with large core size	Mains transformer
6	Which of the following is NOT a common capacitor working voltage	15V
7	8.98554 x 10^-11	Stathenry
8	1.112650 x 10^-12	Statfarad
9	3.33585 x 10^-11	Statoersted
10	What is the approximate value of the smoothing factor of a power supply filter	6.28fRC
11	Type of lead with high current, high-heat temperature	Silver
12	Type of lead with high melting temperature up to 200°C	Tin-lead 50:50
13	Type of lead with melting point as low as 180°C	Tin-lead 63:37
14	A power-factor-boosting capacitor connected in parallel with the main winding in an induction motor	Motor-run capacitor
15	In Wien effect, . . . . , the voltage must be greater than approximately 1 MV per	50cm
16	What refers to a three-stage binary circuit with feedback from stage three to stage one	Divide-by-seven network
17	What refers to the ability of an electronic system to provide a complete series of operations, all in minimum instruction and supervision	Smartness
18	A microphone in which highly sensitive in one direction and insensitive to all other directions	Supercardioid microphone
19	An adjustable, dual slide wire balancing resistor used to eliminate the necessity of sliding contacts	Wenner element
20	Used for calculating the inductance of a multilayer air-core coil	Wheeler’s formula
21	For a given orientation and environment for 2 inductors, the value of the mutual inductance doe not change, regardless of the magnitude, frequency or phase of the currents in the coils	Neumann’s law
22	What refers to a class of capacitor that is considered obsolete	Class 4
23	A strain-gauge bridge is a four-wire resistance bridge in which an electric strain-gauge forms ____ arm	1
24	What is a set of photovoltaic cells connected in series, parallel or series-parallel to produce useful voltages and currents	Sun battery
25	A noninductive winding comprising two inductors conducting currents in opposite directions	Aryton-perry winding
26	_____ is an step-adjustable universal shunt resistor for varying the resistivity of a galvanometer and has the virtue of keeping the galvanometer critically damped	Aryton-mather galvanometer shunt
27	A relatively simple relaxation oscillator made of a neon bulb, capacitor and resistor is called	Neon-bulb sawtooth generator
28	What refers to bioelectric pulses of 10 to 1000 mV amplitude of the muscular activity	Myoelectricity
29	What is the simplest type of oscillator to design	RC relaxation oscillator
30	A circuit breaker in which the occurring arc when the contacts open is quickly extinguished by an external magnetic device is called	Deion circuit breaker
31	A circuit breaker in which the occurring arc when the contacts open is quickly extinguished by an external magnetic device is called	Deion circuit breaker
32	What is the result of auto-ionization	Positive charged atom
33	Several monolithic IC chips are interconnected together to form a large, single-package circuit	Monobrid circuit
34	A common germanium OA47 semiconductor diode is which of the following applications	Signal detection
35	An alternating current (AC) motor which starts like a two-phase motor and runs like a single-phase motor	Split-phase
36	In a split-phase, a centrifugal switch cuts out the starting winding when the machine approaches approximately ____ of full speed	75%
37	What refers to a magnet that reduces the tendency of arcing in relay-control instruments	Snap magnet
38	What is the effect of combining a number of 6 db per octave filters together	Sharper falloff
39	The gradual increase of transistor leakage current is called	Sleeping sickness
40	Inductor used temporarily of usual the same actual value during troubleshooting	Substitution inductor
41	A mixer system in which the local oscillator produces two accurate frequencies separated by a several few hundred Hertz	Double local oscillator
42	There are four classes of capacitors from class 1 to class 4. What is the relationship between class number and capacitor performance	The lower the class number the higher the performance
43	Condition when the relative permeability of the core will be reduced almost to the value for air so the transformer will be almost lost	Core saturation
44	What refers to a special short-circuited motor winding that opposes pulsations or rotations of the magnetic field	Damper winding
45	The rating of a DC generator based on the size of the conductor and the amount of heat that can be dissipated in the generator	Current rating
46	A bridge with an adjustable arm (potentiometer) and a pair of binding poles for each of the other three arms	Skeleton bridge
47	An oscillator tube on whose white screen persistence magenta image by the electron beam	Dark-trace tube
48	What is the magnetic force between adjacent current-carrying conductor	Motor-effect
49	Degradation of hole life due to the presence of magnetic field	Suhl effect
50	______ is a simple potentiometer consisting a single, straight piece of wire resistance with a sliding contact	Slide wire
51	______ is a galvanometer with a movable arm consisting of two identical magnetized needles	Astatic galvanometer
52	What is a notch filter with a continuous variable Wien bridge circuits and is tuned to remove a troublesome heterodyne whistle	Wien-bridge heterodyne eliminator
53	Observed in the surface of a sample of material, NOT throughout the body of a material	Surface effect
54	Popular semiconductor diode low-voltage rectifier diode	IN4001
55	In the code of class 1 dielectrics, what is the symbol used to indicate the significant figures of the temperature coefficient in ppm/degree Celsius	First class
56	What is the typical range of efficiencies of a transformer encountered in an electronic circuit	80 – 90 %
57	What do you call the strong brown paper used for insulation and as the dielectric of paper capacitors	Kraft paper
58	What is the primary caused of buckling of the plates and excessive sediments to build up	Overcharging and overdischarging
59	Which of the following is a diode-biased circuit used as an automatic noise limiter	Noise clipper
60	In active filter designs, which element or component is NOT needed	Inductor
61	The phase angle between signal current and signal voltage	Loss angle
62	The tendency for a potential difference to develop at opposite ends of a length of wire	Wertheim effect
63	What refers to the movement of dielectric particles through a liquid	Electrophoresis
64	_____ is a reinforcing, dielectric material (such as plastic) placed in a ferromagnetic core	Slot cell
65	In the cathode-ray tube (CRT) of a storage oscilloscope, ____ is a fine metal mesh electrode that serves as the target in which the image is electrostatically stored	Storage mesh
66	An oscillator with two field effect transistors that is equivalent to a collector-coupled bipolar transistor multivibrator	Drain-coupled multivibrator
67	What experiment consists of rotating about its axis a hollow dielectric cylinder in a magnetic field parallel to its axis	Wilson experiment
68	What is known as the pure resistance of a capacitor for an AC signal	Effective series resistance (ESR)
69	A semiconductor diode used to prevent inductive kickbacks in the circuit, reduces or eliminates transients, or prevents arcing between make-and-break contacts	Suppressor diode
70	Used in the famous Theremin and is also used in proximity detectors	Compression trimmer
71	Some areas covered are secured at all times	Zoning circuit
72	An assembly of two series connected transistors in the same envelope is known as the	Tandem transistor
73	A movable-coil meter in which the conventional spiral spring of the coil is replaced by two tightly stretched, thin, straight metal ribbons	Taut-band meter
74	An electronic voltmeter in which an unknown AC signal voltage applied to the input of the amplifier stage bucked by an internal, adjustable, accurately known signal voltage is called	Slide-back meter
75	What term is sometimes used to denote the unit that supplies energy to a vacuum-tube filament	Ans: A power supply Choices: a. B power supply b. D power supply c. A power supply d. C power supply
76	In a digital-to-analog converter, a condition where the output either remains the same or increases for any increase in the input code	Monotonicity
77	A servomotor whose shaft has a copper or aluminum drag cup	Drag-cup motor
78	A crystal oscillator in which the crystal is connected between the control electrode and ground	Miller oscillator
79	A robot-control device via which an operator can program the machine to perform specific movements is called	Teach box
80	A natural quartz crystal which produced the piezoelectric plates	Mother crystal
81	An inverting parametric amplifier in which the two signals are of the same frequency, which is half of the pump frequency	Degenerate parametric amplifier
82	What refers to a highly efficient linear radio frequency amplifier	Doherty amplifier
83	The one output of a magnetic cell that has received a partial write pulse train because it was last written into is called	Disturbed-one output
84	Analog audio-frequency meter read-out lamp has a typical range of 20 Hz to	100 kHz
85	Digital audio-frequency meter read-out lamp has a typical range of 10 Hz to	15 MHz
86	The frequency signal that reaches the output with no more than -3dB worth of attenuation	Passband frequency
87	The tendency of a wire or a metallic bodies to act as an antenna	Antenna effect
88	In filter designs, the distortion _____ as the order of chebyshev and butterworth increases	Increases
89	A tube that conducts by means of ionization of an internal gas	Muller tube
90	An electrochemical cell of very small size such as the one used in watches	Miniature cell
91	What do you call a semiconductor that behaves like a metal over a wide range of temperature	Degenerate semiconductor
92	The process of shrinking the size and power dissipation of an electronic circuit which uses surface mount technology	Microminiaturization

Section 1 Modules: Reviewers in Electronic Engineering

Reviewer for Section 1 Modules in Electronics Engineering (Q&A)

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