4-6 radi
Help!
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| show | False
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| Which of the following is a common insulator? | show 🗑
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| An open circuit will conduct electricity. | show 🗑
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| What purpose does a circuit breaker serve in an electric circuit? | show 🗑
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| An electrical device with a deficiency of electrons will do which of the following when grounded? | show 🗑
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| show | ---] [---
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| show | positive
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| show | Electrons
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| show | negative charges
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| According to Coulomb’s Law, what will happen to the electrostatic force between two charges if the distance between them is cut in half? | show 🗑
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| show | Friction
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| show | Increase
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| show | 1 &3
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| The SI unit for charge or current flow per second is: | show 🗑
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| show | Low
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| show | 2 and 3 only
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| show | Resistance
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| show | Material with few free electrons/ high temperature.
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| An electric circuit has a current of 6 amperes and a resistance of 3 ohms. What is the current if you increase the total resistance in the circuit to 6 ohms? (Assume that the voltage is unchanged.) | show 🗑
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| show | 100V
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| show | 1650W
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| show | 200mA
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| How many volts are required to move a current of 60 amperes across a circuit having a resistance of 2 ohms? | show 🗑
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| A series circuit has resistors measuring 10, 15, 20 and 30 ohms with a current of 5 amps. What is the total voltage of the circuit? | show 🗑
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| Three resistors are connected in parallel to a battery of 18V, with resistances of 3 ohms, 6 ohms, and 9 ohms. What is the total resistance? | show 🗑
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| What is the total current in the circuit connected in parallel to a battery of 18V, with resistances of 3 ohms, 6 ohms, and 9 ohms? | show 🗑
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| Four resistors are connected in series to a battery of 6 V, with resistances of 2 ohms, 4 ohms, 5 ohms, and 10 ohms. What is the total resistance? | show 🗑
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| What is the total current in the series circuit with a battery of 6 V, with resistances of 2 ohms, 4 ohms, 5 ohms, and 7 ohms? | show 🗑
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| The rotation of electrons on their axis is the property called ____________. | show 🗑
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| An electric potential applied to a conductor produces __________. | show 🗑
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| Like charges _______ and unlike charges _______. | show 🗑
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| An alternating (AC) current is represented by a __________ line. | show 🗑
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| The charges on an electrified object are distributed __________. | show 🗑
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| In the United States, alternating current goes through a complete cycle every _____ second. | show 🗑
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| Electrification occurs through the movement of ___________. | show 🗑
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| show | volt
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| show | flashlight
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| Alternating current is produced by a ___________. | show 🗑
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| show | electron
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| show | battery
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| show | magnetic field
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| show | sharpest curvatures
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| Electrostatic force is _________ proportional to the distance between charges, and _______ proportional to the product of the charges. | show 🗑
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| Electrical power is measured in _____. | show 🗑
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| What is the unique electron characteristic of magnetic materials? | show 🗑
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| Lines of magnetic flux traveling in the same direction will attract each other. | show 🗑
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| show | 1/8 inch
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| show | Electromagnet
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| Platinum is magnetically classified as which of the following? | show 🗑
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| show | True
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| show | repel
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| Which scientist used a compass and a wire carrying electric current to demonstrate and study electromagnetism? | show 🗑
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| If this circle with a dot in the center represents a wire carrying electric current to toward you, which of the following is true? | show 🗑
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| Depending on the application of the right-hand rule, the thumb can indicate either current flow or direction of the magnetic field. | show 🗑
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| The following describes four different coils. Which one, if moved through a magnetic field, would create the least voltage? | show 🗑
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| show | 220
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| show | true
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| show | Lenz
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| show | magnetism
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| show | lines of flux
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| Inside the magnet, the lines of flux travel from | show 🗑
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| Outside the magnet, the lines of flux travel from | show 🗑
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| Like poles of a magnet _________ each other and opposite poles ________ each other. | show 🗑
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| The force of magnetic attraction varies | show 🗑
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| show | Tesla
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| A material that is weakly repelled by a magnetic field is classified as | show 🗑
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| A material that is strongly attracted to a magnetic field is | show 🗑
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| A material that is weakly attracted to a magnetic field is | show 🗑
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| show | nonmagnetic
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| show | oersted
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| show | faraday
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| show | current
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| An electromagnet includes: | show 🗑
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| Reducing the number of coils in the wire will result in | show 🗑
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| show | increased electromagnetic induction.
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| Slowing down the speed at which the conductor passes through the magnetic field results in | show 🗑
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| show | secondary coil
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| show | alternating current in the primary coil of wire.
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| show | alternating
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| With self-induction, the secondary current | show 🗑
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| show | Lenz’s law.
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| show | false
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| show | true
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| show | false
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| show | false
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| With alternating current, the north and south poles of the magnetic field surrounding the wire change each time the electrons change direction. | show 🗑
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| What atomic characteristic of a magnetic material creates a dipole? | show 🗑
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| show | atoms
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| show | it is distorted
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| show | true
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| show | two poles at this level
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| show | very strong repulsion
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| show | artificial permanent
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| Materials strongly attracted to magnets are classified as which of the following? | show 🗑
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| show | true
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| show | true
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| show | false
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| show | true
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| The inverse square law applies to both electric and magnetic fields. | show 🗑
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| show | oersted
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| If this circle with an “x” in the center represents a wire carrying current away from you, which of the following is true? | show 🗑
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||||
| What is the advantage of configuring a wire carrying electric current into a coil (spring)? | show 🗑
|
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| The following are four different magnetic fields. If the same coil of wire is passed through each, which will result in the greatest induced voltage? | show 🗑
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| show | 90 degree angle to the field
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|
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| The basic premise of electromagnetic induction is that which of the following move? | show 🗑
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| Why is AC desirable for mutual induction? | show 🗑
|
||||
| What happens to filament electron after they interact with atoms? | show 🗑
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| show | False
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|
||||
| If an N shell electron fills an M shell vacancy, what is the energy of the photon produced? | show 🗑
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| show | 12.02
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| If filling a K shell vacancy, which shell electron would produce the highest energy characteristic photon? | show 🗑
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| Characteristic photons are produced with the filling of each shell vacancy. | show 🗑
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| show | L
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| As the distance between the filament electron and nucleus gets smaller, what happens to the brems photon energy? | show 🗑
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| If a filament electron enters an atom with 70 keV of energy, passes the nucleus and leaves with 10 keV, what is produced? | show 🗑
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| Brems is the interaction that occurs most often. | show 🗑
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| During x-ray production the electrons penetrate the target approximately | show 🗑
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| X-rays are produced by | show 🗑
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| show | outer shell electrons of tungsten atoms
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| show | 99% every lost as heat; 1% result in x-ray
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| show | a characteristic x-ray photon
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| show | when an inner-shell electron is knocked out and when outer-shell electrons fill the vacancy in an inner shell.
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| The energy of the characteristic x-ray photon depends on | show 🗑
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| show | 66.7keV
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| show | characteristic cascade
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| Bremsstrahlung means | show 🗑
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||||
| During the bremsstrahlung interaction, the filament electron | show 🗑
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||||
| The energy of the brems photon depends on | show 🗑
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| show | the filament electron traveled very far from the nucleus
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| show | 80 keV
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| show | 1/3
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| show | brems photons
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| A discrete emission spectrum is a graphic representation of | show 🗑
|
||||
| show | bremsstrahlung radiation
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| show | characteristic radiation and bremsstrahlung
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|
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| The x-axis for all emission spectra represents the | show 🗑
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| The y-axis for all emission spectra represents the | show 🗑
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| show | BOTH OF THESE: K-characteristic & L -characteristic
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||||
| L-characteristic and higher photon energies are not usually displayed on a discrete emission spectrum because | show 🗑
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| show | 75 keV
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| show | 25 keV
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|
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| With the x-ray emission spectrum, the discrete line is the highest energy ___________________ bar. | show 🗑
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| show | 69 keV
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| show | quality
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| show | a decrease along the y-axis
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| show | an increase along the y-axis and a shift to the right along the x-axis
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| show | BOTH OF THESE: Changing along the x-axis & changing along the y-axis
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| show | BOTH OF THESE: chaining along the x-axis & changing along the y-axis
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|
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| Changing the ___________________ results in changes to the x-axis, y-axis, and location of the discrete line of the x-ray emission spectrum. | show 🗑
|
||||
| As filament electrons enter the anode target, most interact with inner shell electrons of the tungsten atoms. F/T | show 🗑
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| At the anode target, 1% of the energy from filament electrons is lost as heat and 99% will result in x-ray production T/F | show 🗑
|
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| A 65-keV filament electron is not able to produce characteristic radiation. T/F | show 🗑
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| When 65 kVp is set on the operating console, no K-characteristic radiation is produced. T/F | show 🗑
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| show | False
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| show | true
🗑
|
||||
| T/F. When the kVp is changed from 60 to 120, the discrete line on the x-ray emission spectrum shifts to the right. | show 🗑
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| show | Bone
🗑
|
||||
| Which interaction, within the diagnostic range, does not involve the removal of an orbital electron? | show 🗑
|
||||
| show | photodisintegration
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|
||||
| show | None of the above
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|
||||
| show | photoelectric
🗑
|
||||
| show | Photodisintegration
🗑
|
||||
| When the kVp selected is equal to or slightly greater than the inner shell binding energy of a tissue atom, which interaction predominates? | show 🗑
|
||||
| show | photoelectric
🗑
|
||||
| show | Compton
🗑
|
||||
| During coherent scattering, the scattered photon possesses _____ as the incident photon. | show 🗑
|
||||
| show | F
🗑
|
||||
| What is the source of energy that results in characteristic photons? | show 🗑
|
||||
| show | 68.9
🗑
|
||||
| show | 2.74
🗑
|
||||
| Given vacancies are filled randomly, which shell is most likely to fill an L shell vacancy? | show 🗑
|
||||
| If filling a K shell vacancy, which shell would produce the weakest photon? | show 🗑
|
||||
| Which shell interaction produces the most useful characteristic photon? | show 🗑
|
||||
| Which of the following filament electron energies will remove a K shell electron from a tungsten atom? | show 🗑
|
||||
| show | 100 keV brems
🗑
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||||
| show | 30 keV
🗑
|
||||
| show | Is deflected with resulting energy loss
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|
||||
| show |
🗑
|
||||
| show | HEAT
🗑
|
||||
| Most of the x-rays produced in a tungsten target are: | show 🗑
|
||||
| show | 100 %
🗑
|
||||
| Penetration will result in which shades of the radiographic image? | show 🗑
|
||||
| Penetration is more likely with which photon energy? | show 🗑
|
||||
| Which of the following equates to patient dose? | show 🗑
|
||||
| show | photoelectric
🗑
|
||||
| show | true
🗑
|
||||
| Which of the following affects quantity? | show 🗑
|
||||
| show | unaffected by mAs
🗑
|
||||
| show | kVp
🗑
|
||||
| show | Attenuation
🗑
|
||||
| Basically, an x-ray image results from: | show 🗑
|
||||
| Classical interactions are also known as | show 🗑
|
||||
| Coherent scattering involves | show 🗑
|
||||
| The x-ray photon produced during classical scattering | show 🗑
|
||||
| show | travels in a different direction than the incoming photon
🗑
|
||||
| show | are absorbed in the body
🗑
|
||||
| show | slightly increase dose
🗑
|
||||
| The effect of classical scatter interactions on image quality | show 🗑
|
||||
| Compton scattering involves the x-ray photon | show 🗑
|
||||
| show | 20–40 keV.
🗑
|
||||
| show | moderate-energy photons.
🗑
|
||||
| show | loses up to one third of its energy.
🗑
|
||||
| Compton scattering results in | show 🗑
|
||||
| show | ALL OF THESE: secondary photons are produce, a secondary electron is ejected, a Compton scatter photon is produced
🗑
|
||||
| show | are characteristic x-ray photons
🗑
|
||||
| show | contribute to patient dose
🗑
|
||||
| The Compton electron | show 🗑
|
||||
| show | may exit the patient as part of the remnant radiation and has enough energy to produce further interactions.
🗑
|
||||
| When it does interact with the image receptor, the Compton scatter photon contributes no useful information because | show 🗑
|
||||
| The fog seen on the radiographic image is the result of | show 🗑
|
||||
| show | is very important in producing quality images
🗑
|
||||
| show | the lower the energy of the photon
🗑
|
||||
| No matter which direction the Compton scatter photon goes, it retains approximately | show 🗑
|
||||
| The major source of radiation exposure to technologists is due to | show 🗑
|
||||
| The primary source of radiation exposure to the radiographer who is in the room during an exposure is | show 🗑
|
||||
| To minimize occupational exposure, the technologist should | show 🗑
|
||||
| show | may be the same or greater than the binding energy of an inner-shell electron
🗑
|
||||
| show | loses all of its energy and no longer exists
🗑
|
||||
| show | an inner-shell electron is ejected
🗑
|
||||
| show | a photoelectron and ionized atom
🗑
|
||||
| show | the energy of the incident photon minus the binding energy of the orbital electron
🗑
|
||||
| The energy of the photoelectron is the least as a result of a photoelectric interaction in | show 🗑
|
||||
| show | contribute significantly to patient dose
🗑
|
||||
| Secondary x-ray photons are the result of | show 🗑
|
||||
| show | bone
🗑
|
||||
| show | has a high atomic number
🗑
|
||||
| Barium sulfate is used as a contrast agent to visualize soft tissue structures such as the stomach because it | show 🗑
|
||||
| Pair production | show 🗑
|
||||
| show | 1.02MeV.
🗑
|
||||
| show | the nucleus of the atom
🗑
|
||||
| What is produced as a result of pair production, a(n) | show 🗑
|
||||
| A positron is | show 🗑
|
||||
| After ejection from the atom’s nucleus, when the positron interacts with an electron | show 🗑
|
||||
| For photodisintegration to occur, the incident photon must have an energy level of at least | show 🗑
|
||||
| Photodisintegration occurs when the incident photon interacts with | show 🗑
|
||||
| show | neutrons and protons being ejected from the nucleus
🗑
|
||||
| show | never occur during radiographic procedures
🗑
|
||||
| show | ALL OF THESE: photoelectric interactions, transmitted photons, differential absorption
🗑
|
||||
| show | a light shade of gray
🗑
|
||||
| show | transmitted
🗑
|
||||
| show | radiopaque
🗑
|
||||
| show | radiolucent
🗑
|
||||
| The greater the absorption of radiation | show 🗑
|
||||
| A breakage of the major structure and framework of the macromolecule as a result of an x-ray interaction is called | show 🗑
|
||||
| The most radiosensitive molecule in the body is | show 🗑
|
||||
| show | using the kVp that is too low for examination
🗑
|
||||
| show | true
🗑
|
||||
| T/F. The probability of Compton scattering depends on the atomic number of the atom. | show 🗑
|
||||
| show | true
🗑
|
||||
| T/F. All Compton scatter photons travel in the direction of the image receptor. | show 🗑
|
||||
| T/F. The photoelectric interaction and Compton interaction can both result in a characteristic cascade, producing characteristic radiation. | show 🗑
|
||||
| show | true
🗑
|
||||
| T/F. The probability of a photoelectric interaction depends on the energy level of the incident x-ray photon. | show 🗑
|
||||
| T/FThe more the energy of the incident x-ray photon exceeds the binding energy of the inner-shell electron, the greater the probability of a photoelectric interaction. | show 🗑
|
||||
| T/F.The higher the atomic number of an atom, the greater the probability of a photoelectric interaction. | show 🗑
|
||||
| show | True
🗑
|
||||
| show |
🗑
|
||||
| Which type of interaction will only occur with x-ray energies greater than 10 MeV? | show 🗑
|
||||
| show |
🗑
|
||||
| Which interaction is the primary contributor to image fog? | show 🗑
|
||||
| The total absorption of an incident photon with the ejection of an inner shell electron is the result of which effect? | show 🗑
|
||||
| Which of the following involves the removal of an orbital electron from an atom of target tissue? | show 🗑
|
||||
| Which of the following is the result of excitation of an orbital electron without removing it from its shell? | show 🗑
|
||||
| show |
🗑
|
||||
| show |
🗑
|
||||
| Compton scattering occurs when an incident x-ray photon interacts with a(n): | show 🗑
|
||||
| show |
🗑
|
||||
| Compton interactions: | show 🗑
|
||||
| show |
🗑
|
||||
| An incident x-ray interacts with an atom without ionization during? | show 🗑
|
||||
| When x-ray photons interact with matter and change direction, the process is called: | show 🗑
|
||||
| show |
🗑
|
||||
| show |
🗑
|
||||
| show |
🗑
|
||||
| show |
🗑
|
||||
| What happens to absorption as kVp increases? | show 🗑
|
||||
| show |
🗑
|
||||
| If kVp is doubled, what happens to quantity? | show 🗑
|
||||
| Half-value layer is a measure of quality. | show 🗑
|
||||
| Which of the following would absorb the least x-rays? | show 🗑
|
||||
| Which of the following would absorb the most x-rays? | show 🗑
|
||||
| Which of the following would decrease the quantity, but increase the quality of the primary beam? | show 🗑
|
||||
| show |
🗑
|
||||
| When the mass density of an absorber is increased, Photoelectric absorption ______________. | show 🗑
|
||||
| Differential absorption is dependent on (the) _____. | show 🗑
|
||||
| Attenuation is caused by: | show 🗑
|
||||
| show |
🗑
|
||||
| show |
🗑
|
||||
| show |
🗑
|
||||
| X-ray quantity increases in direct proportion to increases in: | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Thuythi15