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1-13 Flashcards

0
Q

Anything that occupies space or has mass is

A

Matter

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1
Q

IA substance made up of Atoms of more than one type is a

A

Compound

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2
Q

The atomic number of an element is

A

The number of protons in the nucleus

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3
Q

What is the max number of electrons in the valence of an Atom

A

8

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4
Q

What happens to the energy from electrons furthest from the nucleus

A

It increases

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5
Q

What is a free electron

A

An electron that broke loose from its atom

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6
Q

Semiconductor has how many valence electrons?

A

4

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7
Q

What is the smallest portion that substance can be broken down to

A

Molecule

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8
Q

What is the smallest portion an element can be broken down to

A

Atom

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9
Q

Protons have a charge equal but opposite to electrons

true or false

A

True

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10
Q

Positive Adams have less electrons then protons

true or false

A

True

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11
Q

What do you like charges dO

A

Repel

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12
Q

What do you unlike charges do

A

Attract

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13
Q

How do you bodies become charged

A

Friction conduction induction

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14
Q

How do you neutralize a charge

A

Bring equal and opposite charges together or contact them with earth

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15
Q

Applications for electric charging

A

Painting sandpaper air filters xerography

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16
Q

Hazards of electric charge

A

Lightning and fuel transfer

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17
Q

How do you electrons flow out of the source

A

Negative to positive

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18
Q

What is a force that acts at a distance with no contact

A

Field force

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19
Q

What is a charge at one point with respect to another

A

Polarity

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20
Q

What is the work per-unit charge done by an energy source

A

Electro motive force or EMF

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21
Q

Triboelectric effect

A

Friction

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22
Q

Electrochemical force

A

Chemical

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23
Q

Piezoelectric effect

A

Pressure

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24
Q

Thermo electric

A

Heat

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25
Q

Photovoltaic

A

Light/ solar cell

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26
Q

Magnetoelectric

A

Magnetism

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27
Q

What unit is current measured in

A

Amps

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28
Q

What unit is voltage measured in

A

Volts

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29
Q

What unit is power measured in

30
Q

1 horsepower equals

31
Q

What is the calculation for efficiency.

A

P out over P in x 100

32
Q

Power equals?

A

Volts times amps

33
Q

Energy equals

A

Power times time

34
Q

What is resistance

A

Ohms it opposes flow of current

35
Q

Pictoral

A

Untrained people drawn as it appears located relative to location
wire colors by name
always in 3-D

36
Q

Block diagram

A

Flowchart

show circuit relationship

37
Q

One line diagram

A

Also known as Riser diagram components are labeled
they don’t show actual position
don’t show the return Path

38
Q

Wiring diagram

A

Shows actual location of components
Usually uses symbols
Circuit maps
Shows how and where wires are located

39
Q

Schematic diagram

A

Simpler wiring diagram
Ladder diagram conductors either side connection between
Doesn’t show physical relationship

40
Q

What is a short circuit

A

Parallel path of low resistance

41
Q

Current flows through sources from?

A

Positive to negative

42
Q

Current flows from the source?

A

Negative to positive

43
Q

What is watts law?

A

Power equals volts times amps

44
Q

What is ohms law

A

Volts equals amps times ohms

45
Q

How many times does A/C change supply

A

120 times per second

46
Q

What does a load do

A

Changes electrical energy into different type of energy

47
Q

What is the problem with high current

A

Heat and mechanical damage

48
Q

What opens the current for protection

A

A fuse or breaker

49
Q

What happens when the switch is open

A

The circuit is open the switch is off

50
Q

What measures a difference in potential between two points

A

A voltmeter

51
Q

Which meter must you connect only in series never parallel

52
Q

How do you hook up a wattmeter

A

Voltage coil parallel

53
Q

What happens when you use a DC meter with the wrong polarity

A

You could damage the pointer as it goes below zero

54
Q

What is it called when you read the pointer from the side

A

Parallax error

55
Q

What do resistors do

A

Limit current
Change voltage
Produce heat

56
Q

Three types of fixed resistors are

A

Wore wound
Film
Carbon composition

57
Q

Which type a resister is adjustable

58
Q

Which type of resister has the lowest wattage

A

Carbon composition

59
Q

A fuse is it what

A

Overcurrent device

60
Q

The time a fuse takes to open is equal to

A

The magnitude of the current

61
Q

The Edison fuse is a type of what kind of fuse

62
Q

Knife blade type of fuses used over

63
Q

A breaker is a

A

Overcurrent device

64
Q

Best semi conductor

64
Q

What is always constant in a circuit

A

Resistance

65
Q

What is watts loss formula?

A

P= I squared X R

66
Q

What is a solenoid

A

Helically wound coil

67
Q

What is the electron theory?

A

Electrons flow from negative to positive

68
Q

What is a secondary battery cell

A

Rechargeable

69
Q

What is a battery made of

A

Lead and acid

70
Q

1Coloumb/1 Sec equals

71
Q

Conductors have how many valance electrons?

72
Q

Insulators have how many valence electrons?

D1 1-13 (1 decks)

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