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Final Mock 1 Flashcards

0
Q

The two basic types of induction are ___ induction and ____ induction.

A

Self; mutual

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1
Q

The magnitude of an induced current depends on the ________.

A

Angle of the conductor to the magnetic field

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2
Q

With half-wave rectification the current flows through the X-Ray tube during the ____ part of the cycle.

A

Positive

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3
Q

Len’z law states that an induced current flows in a direction that _____ the action that produces it.

A

Opposes

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4
Q

Like charges ___ and unlike charges ____.

A

Repel; attract

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5
Q

The lowest energy range of the electromagnetic spectrum is _____.

A

Radio waves

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6
Q

When a group of dipoles are aligned they create a _____.

A

Magnetic domain

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7
Q

The most widely used support structure for the X-Ray tube is the _____.

A

Ceiling support system

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8
Q

A single-phase waveform has ____ ripple.

A

100%

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9
Q

The mAs timer is usually set to give the ____ mA at the _____ time.

A

Highest; shortest

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10
Q

The step-up transformer increases voltage _____ times.

A

500-1000

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11
Q

A ____ is a source of direct current.

A

Battery

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12
Q

Variations in power distribution to the X-Ray machine are corrected by the _____.

A

Line voltage compensator

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13
Q

Photons tend to interact with matter _____ it’s wavelength.

A

Equal in size to

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14
Q

X-Rays are usually identified by their ____.

A

Energy

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15
Q

The magnetic intensity of an electromagnet is greatly increased by the addition of a(n) ___ core.

A

Iron

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16
Q

Photons with the highest frequencies have the _____.

A

Shortest wavelengths

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17
Q

A magnet created by a coil of wire is called an _____.

A

Electromagnet

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18
Q

The most accurate type of timer is the ____ timer.

A

Electronic

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19
Q

A _____ uses direct current.

A

Flashlight

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20
Q

The reduction of radiation intensity due to scattering and absorption is called ____.

A

Attenuation

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21
Q

The external structure for the X-Ray tube includes the support structure, the protective housing, and the ______.

A

Glass envelope

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22
Q

Most mammography units operate with ____ generators.

A

High frequency

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23
Q

The three main parts of the X-Ray imaging system are the X-Ray tube, ____, and _____.

A

Operating console; high voltage generator

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24
On the surface of an electrical charge is the _____.
Photon
25
Full-wave rectified, three-phase units provide an X-Ray beam at ____ per second.
360 pulses
26
A commutator ring is used to change _____ current to _____ current in an electric generator.
Direct; alternating
27
A transformer has 100 coils on its primary side and 300 coils on the secondary side. What will the voltage be on the secondary side of the primary side is supplied with 120 volts?
360 volts
28
An electric potential applied to a conductor produces a(n) _____.
Electric current
29
What is the mechanical source of energy for electrical generators that supply electricity to our cities?
Waterfalls, steam from atomic power, and windmills
30
Voltage across the X-Ray tube is most constant with _____.
High frequency generators
31
Thermionic emission at the filament determines the _____ across the X-Ray tube during an exposure.
Milliamperage
32
The operating console contains circuits that are _____.
Low voltage only
33
Oersted discovered that an electric current flowing through a wire would affect a ______ nearby.
Compass
34
The rate of rise and fall of a sine wave is called it's ______.
Frequency
35
The rotation of electrons on their axis is the property called _______.
Electron spin
36
The automatic exposure control (AEC) terminates the exposure when _________.
Sufficient radiation reaches the image receptor
37
The negative side of the X-Ray tube holds the ______.
Filament
38
The first batteries were made of stacks of _____ and _____ plates sandwiched together.
Zinc and copper
39
Alternating current is produced by a _______.
Generator
40
Wood, glass and plastic are _____ materials.
Non-magnetic
41
What is the most common cause of tube failure?
Tungsten vaporization
42
A device that converts any form of energy into electrical energy is a source of _________.
Magnetic strength
43
What is the electromagnetic wave equation?
C=fv (lambda = half-life symbol)
44
The X-Ray beam generated by the circuit with the _____ voltage ripple has the _____ quantity and quality.
Lowest; highest
45
Of the wavelength of a beam of electromagnetic radiation increases by a factor of 2, then it's frequency must ______.
Decrease by half
46
What is the industry standard formula for calculating heat units for single phase equipment?
mA x kVp x sec
47
The _____ circuit provides electrons for the X-Ray tube current.
Filament
48
A charged particle in motion created a(n) ______.
Magnetic field
49
Electrostatic force is _____ proportional to the distance between charges and ____ proportional to the product of the charges.
Inversely; directly
50
The modern imaging systems, the components for rectification are _______.
Solid state semiconductors
51
The principle disadvantage of three-phase equipment is ______.
Cost
52
A hertz (Hz) is equal to ______.
1 cycle per second
53
Like magnetic poles ___ and unlike magnetic poles ____.
Repel; attract
54
A diode allows electrons to flow ________.
From cathode to anode
55
What is the SI unit of magnetic field strength?
Tesla
56
The four properties of photons are....
Frequency, wavelength, velocity and amplitude.
57
The intensity of radiation on an object is reduced with distance because the radiation ______.
Is spread out over a greater area
58
Mechanical motion produces electric current in the _______
Electric generator
59
Gamma rays are produced in the ____ of the atom.
Nucleus
60
In the US alternating current goes through a complete cycle every _____ second.
1/60
61
The smallest quantity of any type if electromagnetic radiation is a(n) ______.
Photon
62
The charge on an electrified object are distributed _______.
On the side nearest the charge
63
What is the Ohm's Law?
I = V/R
64
An alternating (AC) current is represented by a ______ line.
Sinusoidal
65
A transformer converts _______.
Electrical potential to higher or lower intensity
66
What is the velocity of all electromagnetic radiation?
3x10^8 m/s
67
Electrification occurs through the movement of _____.
Only electrons
68
Faraday'a experiments proved that a current could be introduced by a magnetic field only if the field is ______.
Changing
69
The difference in the waveform between the primary and secondary side of the high voltage transformer is the _____.
Amplitude
70
An electrical component that works through self-induction is the ______.
Transformer
71
The number of windings on the primary side of a step-up transformer are always ____ than the number of windings on the secondary side.
Less
72
What type of material can be made magnetic when placed in an external magnetic field?
Ferromagnetic
73
A step-down transformer is located in the ____ circuit
Filament
74
The X-Ray generator with the lowest power rating is the ____ system.
Single-phase imaging
75
What is the unit of electric potential?
Volt
76
An electric current can be induced in a coil of wire if it is placed near a(n) ______.
Electromagnet
77
The _____ of electromagnetic radiation is constant.
Velocity
78
If the intensity of light from a flashlight is 4 mililumens (mlm) at a distance of 3 feet, what will the intensity be at 6 feet?
1 mililumens
79
As an X-Ray tube ages, the inside can become coated with tungsten, which can cause _______ in the tube.
Arcing
80
A transformer has 600 coils on its primary side and 30 coils on its secondary side. What is the voltage on the secondary side when the primary side is 220 V?
11 V
81
The high voltage generator contains the high voltage transformer, the ______.
Filament transformer and the rectifiers
82
A coil of wire placed between two poles of a magnet with a strong magnetic field would be an ______.
Electric generator
83
The intensity of radiation ______ proportion to the square if the distance of the object from the source.
Decreases in inverse
84
Rubber and glass are ______.
Insulators
85
The first component to receive power in the X-Ray circuit is the _______.
Auto transformer
86
The energy of a photon is directly proportional to it's ____.
Frequency
87
The diagnostic range of X-Ray energy is ________.
30 to 150 kVp
88
The mass equivalent of a 100 KeV photon of radiation can be calculated using the ________.
Planck quantum equation
89
The current to a transformer must be supplied by a(n) _______.
AC source
90
The force between magnetic poles is proportional to the _____ of the magnetic poles strength divided by the _____ of the distance between them.
Product; square
91
Electrical power is measured in ______.
Watts
92
The autotransformer has ______ winding.
One
93
The most efficient type of transformer is the ________.
Shell-type transformer
94
On the surface of an electrified object the charges concentrate ________.
On the sharpest curvatures

Physics (5 decks)

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