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Elementary Electrical Engineering (AC/DC) > quiz ni colette > Flashcards

quiz ni colette Flashcards

1
Q

basically the parts or elements used in the making of any electrical construction project, developed and constructed for certain purposes

A

electrical materials

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2
Q

control the flow of current in an electrical circuit; carry electrical current from the source to the load or current consuming apparatus; hold and secure wires to its fixtures inside and outside certain places

A

electrical materials

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3
Q

Classification of Electrical Materials through Electrical Conductivity

A

conductors, insulators, semiconductors, superconductors

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4
Q

an object or type of material that permits the flow of electric charges from one particle to another

A

conductors

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5
Q

materials that impede the free flow of electrons

A

insulators

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6
Q

particles do not permit the free flow of electric charges

A

insulators

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7
Q

materials that exhibit behavior somewhere between that of conductors and that of insulators

A

semiconductor

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8
Q

present very low resistance to the flow of current

A

conductors

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9
Q

conduct very little current even when a large potential difference is applied

A

insulators

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10
Q

exhibits intermediate conductivity

A

semiconductor

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11
Q

has more available charge carriers than an insulator but fewer than a conductor

A

semiconductor

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12
Q

can be used in the fabrication of resistors, capacitors, inductors, and transistors

A

semiconductor

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13
Q

based on integrated circuits which can combine millions or even billions of transistors into one small package

A

semiconductor

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14
Q

when they are at critical temperature, they suddenly become the perfect conductors

A

superconductors

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15
Q

material’s resistance is zero

A

superconductor

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16
Q

usually between absolute zero and 10 Kelvin

A

critical temperature

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17
Q

Classification of Electrical Components

A

active components, passive components

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18
Q

components that supply and control energy

A

active components

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19
Q

components that respond to the flow of electrical energy and can dissipate or store energy

A

passive components

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20
Q

an electrical component that restricts the flow of current in the circuit

A

resistor

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21
Q

a two-terminal linear passive component made from two conductive plates with an insulator between them

A

capacitor

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22
Q

it stores electrical energy when an electrical charge is forced onto its terminals from a power source

A

capacitor

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23
Q

maintains the charge even after getting disconnected from the power source

A

capacitor

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24
Q

a two-terminal passive electrical component; also known as coil or reactor

A

inductor

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25
Q

stores electrical energy in the form of magnetic energy

A

inductor

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26
Q

comprises a conductor, commonly wound into a coil

A

inductor

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27
Q

consists of three terminals made of semiconductor material

A

transistor

28
Q

controls the flow of voltage or current and acts as a switch for electronic signals

A

transistor

29
Q

used to break the circuit

A

switch

30
Q

interrupting the current and to supply the current from one conductor to another conductor

A

switch

31
Q

works with the “on” and “off” mechanisms

A

switch

32
Q

made from a semiconductor material that allows current to flow in one direction

A

diode/light-emitting diode (LED)

33
Q

blocks the current which tries to go against the flow in a wire

A

diode/light-emitting diode (LED)

34
Q

a material or a piece of wire which is used to protect the components from destruction due to the excessive current flowing through them

A

fuse

35
Q

used to connect two or more devices

A

electrical wire/cable

36
Q

enables the transfer of electrical signals or power from one device to the other

A

electrical wire/cable

37
Q

a passive electrical device consisted of two coils of wire linked by an iron core or transformer core

A

transformer

38
Q

transfers electrical energy between two or more circuits

A

transformer

39
Q

used to convert chemical energy into electrical energy through electrochemical discharge reactions

A

battery

40
Q

converts mechanical energy into electrical energy by electromagnetic induction

A

generator

41
Q

Types of Electrical Generator

A

Dynamo, Alternator

42
Q

creates direct current using a commutator

A

dynamo

43
Q

converts mechanical energy to electrical energy in the form of alternating current

A

alternator

44
Q

Electrical Measuring Instruments

A

ammeters, voltmeters, ohmmeters, wattmeters

45
Q

Classifications of Electrical Measuring Instruments

A

Absolute Instruments, Secondary Instruments

46
Q

instruments that give the value of quantity to be measured in terms of the physical constants of the instruments and their deflection only, not measurable on a graduated scale

A

Absolute Instruments

47
Q

instruments that are calibrated and directly give the value of quantity to be measured

A

Secondary Instruments

48
Q

Types of Secondary Instruments

A

Indicating Instruments, Recording Instruments, Integrating Instruments

49
Q

instruments that are fitted with a pointer which moves over a calibrated scale and indicates the electric quantity to be measured directly on the scale

A

Indicating Instruments

50
Q

instruments that record the electrical quantity to be measured on a graph paper for a desired period

A

Recording Instruments

51
Q

instruments that measure the total quantity of electricity consumed in a circuit given time

A

Integrating Instruments

52
Q

measures electric current

A

ammeter

53
Q

to measure current, it is inserted in series with the circuit being tested

A

ammeter

54
Q

addition of this increases the resistance of the circuit by an amount equal to the internal resistance of the meter

A

ammeter

55
Q

used to measure the potential difference or voltage of a circuit

A

voltmeter

56
Q

instrument to determine resistance

A

ohmmeter

57
Q

consists of a battery, a meter movement calibrated to read ohms, and a resistor

A

ohmmeter

58
Q

a single instrument capable of measuring voltage, resistance, and current

A

multimeter

59
Q

most common multimeter

A

volt-ohm-milliammeter (VOM)

60
Q

measure electrical quantities of current and voltage that change in amplitude and direction periodically with time

A

AC meters

61
Q

for higher frequencies, the AC quantities are first converted to DC and then applied to a __________

A

D’Arsonval Movement

62
Q

simplest type of AC voltmeter

A

half-wave rectifier circuit

63
Q

one way of improving the sensitivity of a rectifier type of ac meter

A

full-wave rectification

64
Q

an instrument that measures DC power or real AC power

A

wattmeter

65
Q

uses fixed coils to indicate current in the circuit and movable coil to indicate voltage

A

wattmeter

66
Q

rated in terms of its maximum current, voltage, and power

A

wattmeter

Elementary Electrical Engineering (AC/DC) (9 decks)

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