Physics 2 Quiz 1 Flashcards
In an x-ray tube most of the electrons energy is converted?
A. Photons
B. Heat
C. Bremsstrahlung
D. Characteristic X-rays
B. Heat
The high voltage on the x-ray tube
A. Creates the electrons
B. Accelerates the electrons
C. Focuses the electrons
D. All answers are correct
B. Accelerates the electrons
Electrons accelerated toward the target may interact with
A. All answers are correct
B. Nucleons
C. Inner shell electrons
D. Outer shell electrons
A. all answers are correct
What is the power produced in an x-ray tube when
operated at 140 kV and 35 mA?
A. 4.9 watts
B. 4900 watts
C. 490 watts
D. 49 kilowatts
B. 4900 watts
Tungsten is a good material for an x-ray target because
A. It has good thermal conductivity
B. It has a high atomic number
C. All answers are correct
D. It has a high atomic melting point
C. All answers are correct
The electrical component which limits the direction of electron travel is called a
A. Dissipater
B. Converter
C. Rectifier
D. Diode
D. Diode
Which of the following is NOT true of a modern x-ray tube
A. The anode is cooled by water or oil
B. It must have a vacuum
C. X-rays travel from the cathode to the anode
D. Electrons are created by thermionic emission
C. X-rays travel from the cathode to the anode
Bremsstranlung x-rays are created when
A. The incident electron loses energy
B. An orbital electron is ejected
C. An electron strikes a nucleon
D. None of the answers are correct
A. The incident electron loses energy
The x-ray tube mA-s is a measure of the
A. Beam potential
B. Charge produced
C. Beam Quality
D. Beam Current
B. Charge Produced
For a given energy beam, the penetration _____ with _____ atomic number
A. Increasing, Increasing
B. Decreases, lower
C. Decreases, decreases
E. Increases, Lower
E. Increases, Lower
Which of the following increases the quality of an x-ray beam
A. Decreasing kVp
B. Increasing filtration
C. Decreasing mA-s
D. None of the answers are correct
B. Increasing filtration
Exposure is a measure of the
A. Intensity of radiation
B. Dose of the beam
C. Electron current
D. Quality of the beam
A. Intensity of radiation
Increasing filtration to an x-ray beam will decrease the
A. Most probable energy of the beam
B. Quality of the beam
C. Quantity of x-rays in the beam
D. Maximum energy of the beam
C. Quantity of x-rays in the beam
The intensity of the x-ray beam is directly proportional to the square of the
A. Potential, kVp
B. Distance, d
C. Filtration
D. Charge, mA-s
A. Potential, kVp
If a 10 keV x-ray beam is attenuated by 15% for each cm of tissue, how much of the original x-ray beam will penetrate through 3cm of tissue?
A. 61%
B. 50%
C. 45%
D. 55%
A. 61%
