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Electrical theory > Quiz 1 > Flashcards

Quiz 1 Flashcards

0
Q

What is matter?

A

Any substance that has mass and takes up space

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1
Q

Who discovered the electron? When?

A

JJ Thomas, 1897

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2
Q

What is an element?

A

The base units that all matter is made up of

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3
Q

How many elements are there?

A

109

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4
Q

What is an atom?

A

The smallest single unit of an element that retains that element’s characteristics

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5
Q

What is a compound?

A

A substance that is comprised of two or more atoms; which are chemically combined.

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6
Q

What is a molecule?

A

The smallest single unit of a compound that retains that compounds characteristics.

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7
Q

What three subatomic parts are atoms made up of?

A

Protons, neutrons, electrons.

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8
Q

What charge do electrons have and where are they located?

A

Orbiting the nucleus, negative charge.

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9
Q

Where are protons located and what charge do they have?

A

Located in the nucleus and are positively charged

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10
Q

Where are neutrons located and what charge do they have?

A

Located in the nucleus, neutral charge.

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11
Q

What is the difference between each element?

A

The number of protons they have

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12
Q

What gives the atomic number and characteristics of an element?

A

The number of protons it has

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13
Q

How many electrons can fit in the first shell about the nucleus?

A

2 electrons

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14
Q

How many electrons can fit in the second shell around the nucleus?

A

Eight electrons

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15
Q

How many electrons can fit in the third shell about the nucleus?

A

18 electrons

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16
Q

How many electrons can fit in the fourth shell about the nucleus?

A

18 electrons

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17
Q

What can be said about an atom that had the same number of protons and electrons?

A

It is balanced

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18
Q

When is an atom said to be stable?

A

When it will not readily react with another element

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19
Q

How is the stability of an element determined?

A

The number of electrons in the outermost shell.

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20
Q

If an atom has a positive charge, what is it known as?

A

Positive ion

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21
Q

If an atom has a negative charge what is it known as?

A

A negative ion

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22
Q

What is electricity?

A

The flow, or transfer of electrons.

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23
Q

What are the two types of electricity?

A

Current electricity, static electricity

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24
Q

What is conventional flow?

A

The orientation of electrons flowing from the positive to the negative

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25
Q

What is electron flow?

A

The orientation of electrons flowing from the negative to the positive

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26
Q

Which is the proper theory for electricity?

A

Electron flow

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27
Q

what is a conductor?

A

An element which will easily give up and receive electrons

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28
Q

What is an insulator?

A

An element which will not easily give up and receive electrons

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29
Q

What will the shell of an insulator look like?

A

The outer shell will be almost completely full

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30
Q

What is a semi conductor?

A

An element which, under certain conditions, will act as a conductor, and will under other conditions act as an insulator

31
Q

What will the shell of a semi conductor look like?

A

The shell would be approximately half full

32
Q

What are the five units of electron transfer?

A

Coulomb, ampere, ohm, voltage, watt

33
Q

What is coulomb a measurement of?

A

Quantity

34
Q

What is the definition of coulomb?

A

6.28 x 10^ 18

35
Q

What is an ohm a measurement of ?

A

Opposition to flow

36
Q

What is the strict definition of ohm?

A

The opposition which allows 1 Amp to be moved by 1 volt

37
Q

What is voltage a measurement of?

A

Electrical pressure, potential, potential difference, electromotive force

38
Q

What is the strict definition of voltage?

A

The electrical pressure required to move one amp through one ohm

39
Q

What is watt a measurement of?

A

Electrical power dissipated

40
Q

What is the strict definition of a watt?

A

The electrical power dissipated by 1

Amp being moved through 1 ohm by 1 volt

41
Q

When using a voltmeter, what are you measuring?

A

Electrical pressure

42
Q

When using a voltmeter, how is it installed in the circuit?

A

In parallel

43
Q

Must polarity be observed with a voltmeter?

A

Yes

44
Q

When the range for a voltmeter is unknown, what must be done?

A

Start at the highest range and work downward

45
Q

How is a voltmeter used?

A

With the circuit complete and on

46
Q

What is an ammeter used to measure?

A

Rate of electron flow

47
Q

How is an ammeter used?

A

With the circuit complete and on

48
Q

How is an ammeter installed?

A

In series with the load or circuit

49
Q

Must polarity be observed with an ammeter?

A

Yes

50
Q

What Must be done if the range is unknown?

A

Start with highest range and work down

51
Q

What is an ohmmeter used to measure?

A

Resistance and continuity

52
Q

How is an ohmmeter used?

A

The component must be isolated from the circuit, and the ohmmeter is used in parallel with said component

53
Q

Is polarity an issue with an ohmmeter?

A

Not unless diodes are considered

54
Q

What is done if the range is unknown?

A

Start with the lowest and work up

55
Q

Two classifications of electricity?

A

Current, static.

56
Q

What is current electricity?

A

The continuous transfer of electrons along a directed path

57
Q

What is static electricity?

A

A momentary transfer of electrons due to a momentary imbalance in ions

58
Q

Do similarly charged particles attract or repel each other?

A

Repel

59
Q

Do oppositely charged particles attract or repel each other?

A

Attract

60
Q

What is the strength of static attraction or repulsion based on?

A

Distance between the charges

61
Q

How will the strength of the charge change?

A

According to the inverse of the square
= 1
__
X^2

62
Q

Affects of static charge in aviation?

A

Interference with electronic navigational equipment, transmission and receiving of communication signals, fire hazard during fueling process, burning out of sensitive avionics

63
Q

What is the purpose of bonding straps?

A

To join all the insulated parts of the aircraft so that the aircraft will be the same static charge throughout, and so that there will be continuity path for all electrical circuits

64
Q

What are static wicks used for?

A

To help disperse the build up of static

Charges to the atmosphere

65
Q

Wheat is a natural magnet?

A

A material that has the property of attaching itself to ferrous materials and which produces a magnetic field external to itself

66
Q

What is flux ?

A

Lines of magnetic force flowing external to the magnet

67
Q

How does flux flow?

A

They leave the North Pole and enter the south at 90°

68
Q

Are lines of flux polarized?

A

Yes

69
Q

What is one line of flux called?

A

A maxwell

70
Q

State the domain theory.

A

All matter consists of infinitely small magnetic fields called domains, which are randomly arranged, if the material is magnetized, all of the domains align themselves north to south

71
Q

What is a gauss?

A

Measurement of flux density

72
Q

What is a Gilbert?

A

A measurement of magnetic force

73
Q

What is retentivity?

A

The ability of a material to retain the alignment of its domains after the outside magnetizing force is removed

74
Q

What is permeability?

A

The ease with which the lines of flux will travel through a material

75
Q

What is reluctance?

A

The ability of a material to resist lines of flux

76
Q

What is true about any naturally magnetized material?

A

It will eventually lose magnetism

Electrical theory (6 decks)

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