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FINALS FALL 2016 > Radiography III > Flashcards

Radiography III Flashcards

1
Q

Most recognized theory - miniature solar system

A

Bohr Theory

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2
Q

Protons have a __ charge

A

+ (positive)

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3
Q

Neutrons have ___ charge

A

No

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4
Q

Electrons have a __ charge

A
  • (negative)
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5
Q

Protons and neutrons reside in _____.

A

Nucleus

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6
Q

Electrons reside in ____.

A

Shells

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7
Q

Shells are named _ through _.

A

K - Q

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8
Q

Equation to determine maximum number of electrons in each shell

A

2n squared

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9
Q

Binding energy is greatest in the __ shell

A

K

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10
Q

Number of protons

A

Atomic Number (Z)

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11
Q

Number of protons and neutrons (electrons)

A

Atomic Mass (A)

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12
Q

Letter for atomic number

A

Z

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13
Q

Letter for atomic mass

A

A

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14
Q

Atoms strive to maintain 8 electrons in outermost shell

A

Octet Configuration

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15
Q

Have same number of protons and electrons

A

Electrically Neutral

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16
Q

Sharing of outershell electrons

A

Covalent Bonding

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17
Q

Giving up or receiving extra electrons

A

Ionic Bonding

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18
Q

Number of electrons in outermost shell

A

Valence Number

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19
Q

Alpha particles consist of __ protons and __ neutrons and possesses a mass

A

2

2

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20
Q

Speed of light (miles/sec. in a vacuum)

A

186,400 miles/sec.

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21
Q

Highest point in a sine wave on top half (forward direction)

A

Crest

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22
Q

Lowest point in sine wave on top half (backward direction)

A

Valley

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23
Q

Distance from base to crest or base to valley

A

Amplitude

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24
Q

Unit of frequency

A

Hertz

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25
Q

Number of oscillations or alternations/sec.

A

Frequency

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26
Q

Distance between 2 crest in a wave

A

Wavelength

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27
Q

Wavelength and frequency are ______ proportional

A

Inversely

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28
Q

Inverse Square Law

A

Old mAs / New mAs = Old distance squared / New distance squared

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29
Q

Electromagnetic Spectrum

“Carry Good Rifles U Very Independent Mighty Rebels”

A 
Cosmic
Gamma
Roentgen
Ultraviolet
Visible Light
Infrared
Microwave
Radio
30
Q

Highest frequency = _______ wavelength

A

Shortest

31
Q

Lowest frequency = _______ wavelength

A

Longest

32
Q

Unit of wavelength

A

Angstrom

33
Q

Useful range of x-ray wavelengths is _____ Angstroms

A

0.1-1

34
Q

Exist as waves and particles

A

Dual Theory of X-rays

Wave-Particle Duality

35
Q

Absorption = scatter

A

Attenuation

36
Q

Energy cannot be created or destroyed but it’s form may be altered

A

Law Conservation of Energy

37
Q

Converts chemical to electrical energy

A

Battery

38
Q

Converts electrical to mechanical energy

A

Motor

39
Q

Converts mechanical to electrical energy

A

Generator

40
Q

Converts AC to DC

A

Rectifier

41
Q

Study of STATionary electric charges

A

ElectroSTATics

42
Q

3 ways to electrify an object (add or remove electrons)

A

Contact
Friction
Induction

43
Q

Contact confers the ____ charge

A

Same

44
Q

Induction confers the _____ charge

A

Opposite

45
Q

SCIO means…

A

Same - Contact

Induction - Opposite

46
Q

Only _____ charges move in a solid conductor

A

Negative

47
Q

The earth is a ball of _______. Ground potential = ____.

A

Electrons

Zero

48
Q

Sparks between clouds and cloud/ground

A

Lightening

49
Q

Fundamental unit of electric charge

A

Coulomb

50
Q

4 Laws of Electrostatistics

A
  1. Likes repel and unlikes attract
  2. Coulombs Law
  3. Most chargers reside on external surface
  4. Concentration of charges is greatest where curvature is greatest
51
Q

Coulomb’s Law

A

Cut distance in 1/2, 4x charge

52
Q

Unit of potential difference/electric potential

A

Volt

53
Q

Unit of current

A

Ampere/Amp

54
Q

Unit of resistance

A

Ohm

55
Q

Study of moving electric charges

A

Electrodynamics

56
Q

Allows flow of electricity (ex: gold, silver, copper)

A

Conductors

57
Q

Does not allow flow of electricity (ex: rubber, glass, plastic)

A

Insulators

58
Q

Allows flow under certain conditions (ex: silicon)

A

Semiconductors

59
Q

Increased cross section of wire = ________ resistance (inversely proportional)

A

Decreased

60
Q

Increased length of wire = ______ resistance (directly proportional)

A

Increased

61
Q

Ohm’s Law

A 
Volts = Amps X Resistance
(V = IR)
62
Q

Amps never change in this circuit. If one resistor goes out, they all go out. (Interdependent)

A

Series

63
Q

Volts never change in this circuit. If one resistor goes out, they don’t all go out. (Independent)

A

Parallel

64
Q

Power Rule

A 
P = IV
W = VA
65
Q

Geographic North Pole is a magnetic _____ pole

A

South

66
Q

Magnetic flux line travel ____ to ____ in space and ____ to ____ inside the magnet

A

North - South

South - North

67
Q

Natural magnets

A

Earth

68
Q

Artificial permanent magnets

A

Horseshoe or bar magnet

69
Q

Temporary when electric current is supplied to a coil of wire

A

Electromagnet

70
Q

Highly attracted to a magnet (ex: iron, cobalt, nickel)

A

Ferromagnetic

71
Q

Partially attracted to a magnet (ex: platinum, Gadolinium)

A

Paramagnetic

72
Q

Not attracted (ex: wood, plastic)

A

Non-magnetic

FINALS FALL 2016 (2 decks)

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