Radiography III

Question 1

Most recognized theory - miniature solar system

Answer 1

Bohr Theory

Question 2

Protons have a __ charge

Answer 2

+ (positive)

Question 3

Neutrons have ___ charge

Answer 3

No

Question 4

Electrons have a __ charge

Answer 4

• (negative)

Question 5

Protons and neutrons reside in _____.

Answer 5

Nucleus

Question 6

Electrons reside in ____.

Answer 6

Shells

Question 7

Shells are named _ through _.

Answer 7

K - Q

Question 8

Equation to determine maximum number of electrons in each shell

Answer 8

2n squared

Question 9

Binding energy is greatest in the __ shell

Answer 9

K

Question 10

Number of protons

Answer 10

Atomic Number (Z)

Question 11

Number of protons and neutrons (electrons)

Answer 11

Atomic Mass (A)

Question 12

Letter for atomic number

Answer 12

Z

Question 13

Letter for atomic mass

Answer 13

A

Question 14

Atoms strive to maintain 8 electrons in outermost shell

Answer 14

Octet Configuration

Question 15

Have same number of protons and electrons

Answer 15

Electrically Neutral

Question 16

Sharing of outershell electrons

Answer 16

Covalent Bonding

Question 17

Giving up or receiving extra electrons

Answer 17

Ionic Bonding

Question 18

Number of electrons in outermost shell

Answer 18

Valence Number

Question 19

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

Answer 19

2

2

Question 20

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

Answer 20

186,400 miles/sec.

Question 21

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

Answer 21

Crest

Question 22

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

Answer 22

Valley

Question 23

Distance from base to crest or base to valley

Answer 23

Amplitude

Question 24

Unit of frequency

Answer 24

Hertz

Question 25

Number of oscillations or alternations/sec.

Answer 25

Frequency

Question 26

Distance between 2 crest in a wave

Answer 26

Wavelength

Question 27

Wavelength and frequency are ______ proportional

Answer 27

Inversely

Question 28

Inverse Square Law

Answer 28

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

Question 29

Electromagnetic Spectrum "Carry Good Rifles U Very Independent Mighty Rebels"

Answer 29

``` Cosmic Gamma Roentgen Ultraviolet Visible Light Infrared Microwave Radio ```

Question 30

Highest frequency = _______ wavelength

Answer 30

Shortest

Question 31

Lowest frequency = _______ wavelength

Answer 31

Longest

Question 32

Unit of wavelength

Answer 32

Angstrom

Question 33

Useful range of x-ray wavelengths is _____ Angstroms

Answer 33

0.1-1

Question 34

Exist as waves and particles

Answer 34

Dual Theory of X-rays | Wave-Particle Duality

Question 35

Absorption = scatter

Answer 35

Attenuation

Question 36

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

Answer 36

Law Conservation of Energy

Question 37

Converts chemical to electrical energy

Answer 37

Battery

Question 38

Converts electrical to mechanical energy

Answer 38

Motor

Question 39

Converts mechanical to electrical energy

Answer 39

Generator

Question 40

Converts AC to DC

Answer 40

Rectifier

Question 41

Study of STATionary electric charges

Answer 41

ElectroSTATics

Question 42

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

Answer 42

Contact Friction Induction

Question 43

Contact confers the ____ charge

Answer 43

Same

Question 44

Induction confers the _____ charge

Answer 44

Opposite

Question 45

SCIO means...

Answer 45

Same - Contact | Induction - Opposite

Question 46

Only _____ charges move in a solid conductor

Answer 46

Negative

Question 47

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

Answer 47

Electrons | Zero

Question 48

Sparks between clouds and cloud/ground

Answer 48

Lightening

Question 49

Fundamental unit of electric charge

Answer 49

Coulomb

Question 50

4 Laws of Electrostatistics

Answer 50

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

Question 51

Coulomb's Law

Answer 51

Cut distance in 1/2, 4x charge

Question 52

Unit of potential difference/electric potential

Answer 52

Volt

Question 53

Unit of current

Answer 53

Ampere/Amp

Question 54

Unit of resistance

Answer 54

Ohm

Question 55

Study of moving electric charges

Answer 55

Electrodynamics

Question 56

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

Answer 56

Conductors

Question 57

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

Answer 57

Insulators

Question 58

Allows flow under certain conditions (ex: silicon)

Answer 58

Semiconductors

Question 59

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

Answer 59

Decreased

Question 60

Increased length of wire = ______ resistance (directly proportional)

Answer 60

Increased

Question 61

Ohm's Law

Answer 61

``` Volts = Amps X Resistance (V = IR) ```

Question 62

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

Answer 62

Series

Question 63

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

Answer 63

Parallel

Question 64

Power Rule

Answer 64

``` P = IV W = VA ```

Question 65

Geographic North Pole is a magnetic _____ pole

Answer 65

South

Question 66

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

Answer 66

North - South | South - North

Question 67

Natural magnets

Answer 67

Earth

Question 68

Artificial permanent magnets

Answer 68

Horseshoe or bar magnet

Question 69

Temporary when electric current is supplied to a coil of wire

Answer 69

Electromagnet

Question 70

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

Answer 70

Ferromagnetic

Question 71

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

Answer 71

Paramagnetic

Question 72

Not attracted (ex: wood, plastic)

Answer 72

Non-magnetic