Radiation Concepts
The orderly arrangement of elements in the periodic table is based upon
What is atomic number
The resistance in a wire decreases as its diameter
What is increases
Electric charges in motion produce
What is a magnetic field
X-ray photon production occurs at the
What is the anode
The electrical device used to adjust the mA selection is a/an
What is the variable resistor or rheostat
The unit of mass is the
What is a kilogram
This mathematical equation R = V/I describes
What is Ohm's Law
A generator is a device that converts mechanical energy to
What is electric energy
The cathode focusing cup has a/an ____ charge.
What is negative
This is routinely used for chest radiography
What is an upright bucky (wall bucky)
The maximum number of electrons found in any energy level (shell) at any point in time is calculated by the formula
What is 2nsquared.
Electric potential is measured in
What is volts
This converts AC to DC.
What is a rectifier
The exact point on the anode where the x-ray beam emanates is the
What is focal spot
This is located between the incoming line and the exposure switch and determines kVp
What is an autotransformer
The sum of protons and neutrons in a nucleus is called the
What is the mass number
A charge would lose most of its energy when it passes through a
What is a resistor
A transformer with more secondary windings than primary windings is considered this
What is a step-up transformer
The use of the line-focus principle causes a problem known as the ____ effect.
What is the anode heel
This regulates exposure time based upon patient thickness and density
What is AEC
The atomic number is the number of ____ contained in the nucleus.
What is protons
This is measured in coulomb/sec.
What is an ampere
The process of electrons being emitted from heated metallic surfaces is called
What is thermionic emission
Leakage radiation from the lead-lined housing must not exceed
What is 100 mR/hr measured at 1 meter.
When full-wave rectification is applied to three-phase current, a ____ ripple is produced.
What is voltage