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WorksheetsCh 2. Dental Radiation Physics
Total questions: 32
Worksheet time: 16mins
Which electrons have the greatest binding energy?
N-shell
M-shell
L-shell
K-shell
What type of electrical charge does the electron carry?
positive
negative
no charge
positive or negative
Which term describes two or more atoms that are joined by chemical bonds?
ion
ion pair
molecule
proton
Which statement describes ionization?
atom without a nucleus
atom that loses an electron
atom with equal numbers of protons and electrons
none of the above
Which term describes the process by which unstable atoms undergo spontaneous disintegration in an effort to attain a more balanced nuclear state?
radiation
radioactivity
ionization
ionizing radiation
Which is not a type of particulate radiation?
alpha particles
beta particles
protons
nucleons
Which is not a type of electromagnetic radiation?
electrons
radar waves
microwaves
x-rays
Which statement is incorrect?
Velocity is the speed of a wave
Wavelength is the distance between waves
Frequency is the number of wavelengths that pass a given point in a certain amount of time
Frequency and wavelength are inversely related
Which statement is incorrect?
x-rays travel at the speed of sound
x-rays have no charge
x-rays cannot be focused to a point
x-rays cause ionization
Which statement is correct?
x-rays are a form of electromagnetic radiation; visible light is not
x-rays have more energy than does visible light
x-rays have a longer wavelength than does visible light
x-rays travel more slowly than visible light
Label the part that is in red
cathode
insulating oil
aluminum discs
tubehead seal
Label the part that is red
glass window
x-ray tube
anode
cathode
Label the part that is in red
cathode
anode
filament circuit
metal housing
Label the part that is in red
insulating oil
metal housing
step down transformer
filament circiut
Label the part that is in red
position indicating device
insulating oil
tubehead seal
x-ray tube
Label the part that is in red
metal housing aluminum discs
lead collimator
filament circiut
cathode
Label the part that is in red
tubehead seal
exposure button
x-ray tube
metal housing
Label the part that is in red
metal step down transformer
metal step up transformer
position indicating device
lead collimator
Label the part that is in red
anode
metal step up transformer
tubehead seal
filament circiut
Label the part that is in red
lead collimator
insulating oil
position indicating device
aluminum disks
Label the part that is in red
tubehead seal
metal step up transformer
cathode
Wilhelm C. Roentgen
Label the part that is in red
anode
cathode
unleaded glass window
x-ray tube
Label the part that is in red
x-ray tube
insulating oil
exposure button
filament circiut
Which regulates the flow of electrical current to the filament of the x-ray tube?
high-voltage circiut
low-voltage circuit
high-voltage transformer
low-voltage transformer
Which is used to increase the voltage in the high-voltage circuit?
step-up transformer
step-down transformer
autotransformer
step-up circuit
Which does not occur when the high-voltage circuit is activated?
The unit produces an audible and visible signal
Electrons produced at the cathode are accelerated across the tube to the anode
X-rays travel from the filament to the target
Heat is produced
Which is the location that x-rays are produced?
positive cathode
positive anode
negative cathode
negative anode
Which is the location where thermionic emission occurs?
positive cathode
positive anode
negative cathode
negative anode
Which accounts for 70% of all the x-ray energy produced at the anode?
general radiation
characteristic radiation
Compton scatter
coherent scatter
Which only occurs at 70 kV or higher and accounts for a very small part of the x-rays produced in the dental x-ray machine?
general radiation
characteristic radiation
Compton scatter
coherent scatter
Which describes primary radiation?
radiation that exits the tubehead
radiation that is created when x-rays come in contact with matter
radiation that has been deflected from its path by interaction with matter
none of the above
Which describes scatter radiation?
radiation that exits the tubehead
radiation that is more penetrating than primary radiation
radiation that has been deflected from its path by interaction with matter
none of the above
