Fall 2016 Final Flashcards
1
Q
_____ Theory most recognized-miniature solar system
A
Bohr
2
Q
- What resides in the nucleus and what charge do they possess?
- What resides in shells and what is it’s charge?
A
- Protons (+) and neutrons (no charge)
2. Electrons (-)
3
Q
Shells are named __1__ through __2__. The formula used to determine max # of electrons in a shell is __3__.
A
- K
- Q
- 2n squared
4
Q
- Which shell is binding energy the greatest?
2. Which shell is binding energy the least?
A
- K
2. Q
5
Q
Atomic # (__1__) is the number of __2__
A
- Z
2. Protons
6
Q
Atomic Mass # (__1__) is the number of __2__ and __3__
A
- A
- Protons
- Neutrons
7
Q
_____ ______-Atoms strive to maintain 8 electrons is outer most shell
A
Octet Configuration
8
Q
____ ____-have the same # of protons and electrons
A
Electrically neutral
9
Q
____ ____- sharing of outer shell electrons
A
Covalent Bonding
10
Q
___ ____- giving up or receiving extra electrons
A
Ionic bonding
11
Q
____ _____- # of electrons in outer most shell
A
Valence number
12
Q
Alpha particles consist of __1__ protons and __2__ neutrons and possesses a __3__.
A
- 2
- 2
- Mass
13
Q
Speed of light = _____ in a vacuum
A
186,400 miles/sec
14
Q
___-highest point in a sine wave on top half (forward direction)
A
Crest
15
Q
____-lowest point in a sine wave on bottom half (backward direction)
A
Valley
16
Q
Amplitude is the distance from base to __1__ or base to __2__.
A
- Crest
2. Valley
17
Q
Unit of frequency
A
Hertz
18
Q
Number of oscillations or alternations/sec
A
Frequency
19
Q
Wavelength is the distance between __1__ __2__ in a wave.
A
2 crests
20
Q
Wavelength and frequency are _____ proportional
A
Inversely
21
Q
Inverse square law
A
Old mAs Old Distance Sq.
——— = ——————
New mAs New Distance Sq.
22
Q
“Carry Good Rifles U Very Independent Mighty Rebels” is an easy way to remember the __1__ from __2__ frequency/shortest WL to __3__ frequency/__4__ wavelength.
A
- Electromagnetic Spectrum
- Highest
- Lowest
- Longest
23
Q
Electromagnetic spectrum from highest frequency to lowest.
A
Cosmic, Gamma, Roentgen, Ultraviolet, Visible light, Infrared, Microwave, Radio
24
Q
Angstrom is a unit of __1__. Useful range of x-ray wavelengths is __2__ to __3__ Angstroms.
A
- Wavelength
- 0.1
- 1
25
Dual Theory of X-rays or __1__ Particle Duality=they exist as waves and __2__.
1. Wave
| 2. Particles
26
Attenuation=____ + _____
Absorption + Scatter
27
Law of Conservation of Energy=Energy cannot be __1__ or __2__ but it's form may be __3__
1. Created
2. Destroyed
3. Altered
28
____ converts chemical to electrical energy
Battery
29
____ converts electrical to mechanical energy
Motor
30
____ converts mechanical to electrical energy
Generator
31
Converts AC to DC
Rectifier
32
ElectroSTATics=study of _____ electric charges
STATionary
33
Way to electric an object:
1.
2.
3.
1. Contact
2. Friction
3. Induction
34
SCIO: Contact confers the __1__ charge; Induction confers the __2__ charge.
1. Same
| 2. Opposite
35
Only ____ charges move in a solid conductor
Negative
36
The earth is a ball of __1__. Ground potential=__2__
1. Electrons
| 2. 0
37
Sparks between loads and cloud/ground are _____
Lightening
38
______ is the undo mental unit electric charge
Coulomb
39
Laws of electrostatics:
1. ____ attract and ____ repel
2. _____ Law
3. Most charges reside on the ___ surface
4. Concentration of charge is greatest where _____ is greatest
1. Unlikes-----Likes
2. Coulomb's
3. External
4. Curvature
40
_____ is the unit of potential difference/electric potential
Volt
41
Unit of current
Ampere/Amp
42
Unit of resistance
Ohm
43
Study of moving electric charges
Electrodynamics
44
Allows flow of electricity
Conductors
45
Some example of conductors is
Gold, silver, and copper
46
Does NOT allow flow of electricity
Insulators
47
Examples of insulators are
Rubber, glass, plastic
48
Allows flow of electricity under certain conditions
Semiconductors
49
Example of semiconductors is
Silicon
50
Increased cross section of wire=_____ resistance (inversely proportional)
Decreased
51
Increased length of wire=_____ resistance (directly proportional)
Increased
52
Ohm's Law: Volts=__1__ X __2__ (__3__)
1. Amps
2. Resistance
3. V=IR
53
Geographic North Pole is the magnetic _____ pole
South
54
In a series circuit the __1__ never change. If one resistor goes out, they __2__.
1. Amps
| 2. All go out
55
1. Are series circuits independent or interdependent?
| 2. What about parallel?
1. Interdependent
| 2. Independent
56
Parallel Circuit=__1__ never change. If one goes out, __2__
1. Volts
| 2. They all don't go out
57
P=IV or __1__=__2__
| POWER RULE
W=VA
58
Magnetic flux lines travel __1__ to __2__ in space and __3__ to __4__ inside the magnetic.
1. North
2. South
3. South
4. North
59
Natural magnets=_____
Earth
60
Artificial permanent magnets=__1__ or __2__ magnet
1. Horseshoe
| 2. Bar
61
Electromagnet=__1__ when electric current is supply to a coil of wire.
Temporary
62
Highly attracted to a magnet
Ferromagnetic
| EX: iron,cobalt, nickel
63
Partially attracted to a magnet
Paramagnetic
| EX: platinum, Gadolinium
64
Non-magnetic are ___ attracted
Not
65
Magnetic susceptibility
Permeability
66
Ability to retain magnetization
Retentivity
67
Soft iron= __1__ permeability and __2__ retentivity;
| Hard steel= __3__ permeability and __4__ retentivity
1. High
2. Low
3. Low
4. High
68
Every current carrying wire is surrounded by a ______
Magnetic field
69
Helix with a current
Solenoid
70
Coil of wire
Helix
71
Solenoid with an iron core
Electromagnet
72
Strength of induced current in a wire is affect by:
1. _____ of magnetic field
2. _____ that wire cuts through magnetic field
3. _____ between wire and mag field
4. _____ of turns
1. Strength
2. Velocity
3. Angle
4. #
73
Ways to induce a current in a wire:
1.
2.
3
1. Pass wire through a magnetic field
2. Pass magnetic field OVER a wire
3. Allow a wire to lay with in varying strength magnetic field
74
Generator-a wire is placed within a __1__. If the wire is rotated, a current will be __2__ in a wire. AC generator uses __3__ and DC generator uses __4__.
1. Magnetic field
2. Induced
3. Slip rings
4. Commutator Ring
75
Motor-a wire is placed within a __1__. If electricity is applied to the wire, it will __2__.
1. Magnetic field
| 2. Rotate
76
Left hand thumb rule: wire grasp in hand...thumb indicates direction of __1__ and fingers indicate direction of __2__.
1. Current flow
| 2. Flux lines
77
Right hand thumb rule:
1. Thumb
2. Index
3. Middle
* *MOTOR RULE**
1. Motion
2. Field
3. Current
78
Left hand rule:
1. Thumb
2. Index
3. Middle
* *GENERATOR RULE**
1. Motion
2. Field
3. Current
79
Anode is rotated by and __1__ motor that has __2__ and __3__.
1. Induction
2. Rotor
3. Stator
80
Auto transformer= AC, __1__ kVp selector, __2__ coil of wire
1. Self induction
| 2. One
81
Transformer law
Vs = Ns
-- --
Vp Np
82
Step-up transformer=AC, __1__ induction, increases volt and decreases __2__, generates __3__, more turns on secondary side, __4__ wire on primary side.
1. Mutual
2. Amps
3. KVP
4. Thicker
83
Step-down transformer=AC, __1__ induction, decreases __2__ no increases __3__, heats filament for __4__ emission, more turns on primary side, __5__ wire on secondary side.
1. Mutual
2. Volts
3. Amps
4. Thermionic
5. Thicker
84
Lamination is
Layering
85
Lamination (layering) of core will help _____ transformer power losses
Decrease
86
Air core, open core, closed core, and shell type are __1__.
| __2__ I most commonly used
1. Transformers
| 2. Shell type
87
Meters on all the time=line voltmeter, filament __1__, pre-reading __2__
1. Ammeter
| 2. Voltmeter
88
__1__ or __2__=Only registers during actual exposure=__3__
1. MAS
2. Milliammeter
3. Tube current
89
Line voltage compensator adjusts incoming volts to maintain _____
220V
90
EXs of Variable Resistors: __1__ coil, __2__, saturable reactor, high __3__ circuit.
1. Choke
2. Rheostat
3. Frequency
91
Falling load generator=RT selects __1__ and generator picks highest mA with __2__ exposure time.
1. MAS
| 2. Shortest
92
Photomultiplier=Exit-type ____ nearly obsolete
AEC
93
Entrance type is modern type of __1__=__2__ Chamber
1. AEC
| 2. Ionization
94
Set back up timer at __1__of expected time (per __2__)
1. 150%
| 2. DTP
95
Self or __1__ Wave Rectification=__2__ impulses/sec through X-ray tube
1. Half
| 2. 60
96
Full Wave (4 valve tube) Rectification=__1__ impulses/sec through X-ray tube (pulsating DC)
120
97
3 phase rectification=_____ impulses/sec through X-ray tube
360
98
Solid State Rectification uses __1__ Technology or NP Junction=Silicon doped with either __2__ (N type) or __3__ (P Type)
1. Semiconductor
2. Arsenic
3. Gallium
99
High frequency generators are most efficient because they not have __1__ ripple; single phase has __2__ ripple.
1. 1%
| 2. 100%
100
Step-up transformer=increased __1__ and decreased __2__ (AC, MUTAL INDUCTION)
1. Voltage
| 2. Amperage
101
Step down transformer= __1__ voltage an __2__ amperage
1. Decreased
| 2. Increased
102
Autotransformer=AKA "_____" (AC SELF INDUCTION)
KV selector
