The two basic types of induction are ___ induction and ____ induction.
Self; mutual
The magnitude of an induced current depends on the ________.
Angle of the conductor to the magnetic field
With half-wave rectification the current flows through the X-Ray tube during the ____ part of the cycle.
Positive
Len’z law states that an induced current flows in a direction that _____ the action that produces it.
Opposes
Like charges ___ and unlike charges ____.
Repel; attract
The lowest energy range of the electromagnetic spectrum is _____.
Radio waves
When a group of dipoles are aligned they create a _____.
Magnetic domain
The most widely used support structure for the X-Ray tube is the _____.
Ceiling support system
A single-phase waveform has ____ ripple.
100%
The mAs timer is usually set to give the ____ mA at the _____ time.
Highest; shortest
The step-up transformer increases voltage _____ times.
500-1000
A ____ is a source of direct current.
Battery
Variations in power distribution to the X-Ray machine are corrected by the _____.
Line voltage compensator
Photons tend to interact with matter _____ it’s wavelength.
Equal in size to
X-Rays are usually identified by their ____.
Energy
The magnetic intensity of an electromagnet is greatly increased by the addition of a(n) ___ core.
Iron
Photons with the highest frequencies have the _____.
Shortest wavelengths
A magnet created by a coil of wire is called an _____.
Electromagnet
The most accurate type of timer is the ____ timer.
Electronic
A _____ uses direct current.
Flashlight
The reduction of radiation intensity due to scattering and absorption is called ____.
Attenuation
The external structure for the X-Ray tube includes the support structure, the protective housing, and the ______.
Glass envelope
Most mammography units operate with ____ generators.
High frequency
The three main parts of the X-Ray imaging system are the X-Ray tube, ____, and _____.
Operating console; high voltage generator
On the surface of an electrical charge is the _____.
Photon
Full-wave rectified, three-phase units provide an X-Ray beam at ____ per second.
360 pulses
A commutator ring is used to change _____ current to _____ current in an electric generator.
Direct; alternating
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
An electric potential applied to a conductor produces a(n) _____.
Electric current
What is the mechanical source of energy for electrical generators that supply electricity to our cities?
Waterfalls, steam from atomic power, and windmills
Voltage across the X-Ray tube is most constant with _____.
High frequency generators
Thermionic emission at the filament determines the _____ across the X-Ray tube during an exposure.
Milliamperage
The operating console contains circuits that are _____.
Low voltage only
Oersted discovered that an electric current flowing through a wire would affect a ______ nearby.
Compass
The rate of rise and fall of a sine wave is called it’s ______.
Frequency
The rotation of electrons on their axis is the property called _______.
Electron spin
The automatic exposure control (AEC) terminates the exposure when _________.
Sufficient radiation reaches the image receptor
The negative side of the X-Ray tube holds the ______.
Filament
The first batteries were made of stacks of _____ and _____ plates sandwiched together.
Zinc and copper
Alternating current is produced by a _______.
Generator
Wood, glass and plastic are _____ materials.
Non-magnetic
What is the most common cause of tube failure?
Tungsten vaporization
A device that converts any form of energy into electrical energy is a source of _________.
Magnetic strength
What is the electromagnetic wave equation?
C=fv (lambda = half-life symbol)
The X-Ray beam generated by the circuit with the _____ voltage ripple has the _____ quantity and quality.
Lowest; highest
Of the wavelength of a beam of electromagnetic radiation increases by a factor of 2, then it’s frequency must ______.
Decrease by half
What is the industry standard formula for calculating heat units for single phase equipment?
mA x kVp x sec
The _____ circuit provides electrons for the X-Ray tube current.
Filament
A charged particle in motion created a(n) ______.
Magnetic field
Electrostatic force is _____ proportional to the distance between charges and ____ proportional to the product of the charges.
Inversely; directly
The modern imaging systems, the components for rectification are _______.
Solid state semiconductors
The principle disadvantage of three-phase equipment is ______.
Cost
A hertz (Hz) is equal to ______.
1 cycle per second
Like magnetic poles ___ and unlike magnetic poles ____.
Repel; attract
A diode allows electrons to flow ________.
From cathode to anode
What is the SI unit of magnetic field strength?
Tesla
The four properties of photons are….
Frequency, wavelength, velocity and amplitude.
The intensity of radiation on an object is reduced with distance because the radiation ______.
Is spread out over a greater area
Mechanical motion produces electric current in the _______
Electric generator
Gamma rays are produced in the ____ of the atom.
Nucleus
In the US alternating current goes through a complete cycle every _____ second.
1/60
The smallest quantity of any type if electromagnetic radiation is a(n) ______.
Photon
The charge on an electrified object are distributed _______.
On the side nearest the charge
What is the Ohm’s Law?
I = V/R
An alternating (AC) current is represented by a ______ line.
Sinusoidal
A transformer converts _______.
Electrical potential to higher or lower intensity
What is the velocity of all electromagnetic radiation?
3x10^8 m/s
Electrification occurs through the movement of _____.
Only electrons
Faraday’a experiments proved that a current could be introduced by a magnetic field only if the field is ______.
Changing
The difference in the waveform between the primary and secondary side of the high voltage transformer is the _____.
Amplitude
An electrical component that works through self-induction is the ______.
Transformer
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
What type of material can be made magnetic when placed in an external magnetic field?
Ferromagnetic
A step-down transformer is located in the ____ circuit
Filament
The X-Ray generator with the lowest power rating is the ____ system.
Single-phase imaging
What is the unit of electric potential?
Volt
An electric current can be induced in a coil of wire if it is placed near a(n) ______.
Electromagnet
The _____ of electromagnetic radiation is constant.
Velocity
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
As an X-Ray tube ages, the inside can become coated with tungsten, which can cause _______ in the tube.
Arcing
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
The high voltage generator contains the high voltage transformer, the ______.
Filament transformer and the rectifiers
A coil of wire placed between two poles of a magnet with a strong magnetic field would be an ______.
Electric generator
The intensity of radiation ______ proportion to the square if the distance of the object from the source.
Decreases in inverse
Rubber and glass are ______.
Insulators
The first component to receive power in the X-Ray circuit is the _______.
Auto transformer
The energy of a photon is directly proportional to it’s ____.
Frequency
The diagnostic range of X-Ray energy is ________.
30 to 150 kVp
The mass equivalent of a 100 KeV photon of radiation can be calculated using the ________.
Planck quantum equation
The current to a transformer must be supplied by a(n) _______.
AC source
The force between magnetic poles is proportional to the _____ of the magnetic poles strength divided by the _____ of the distance between them.
Product; square
Electrical power is measured in ______.
Watts
The autotransformer has ______ winding.
One
The most efficient type of transformer is the ________.
Shell-type transformer
On the surface of an electrified object the charges concentrate ________.
On the sharpest curvatures