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 but not limited to Electronics books, past Board Exams Questions, Journals and the Internet.

Electronics 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


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