Fundamentals
When were x-rays discovered and by who?
November 8, 1895 by Wilhelm Roentgen
Discovery of the electron is attributed to?
Joseph John “J.J.” Thomson
If a conductor is curved where will the greatest amount of charge be found?
at the area of the greatest curvature
What is the protective tube housing lined with?
Lead
What are the different names for classical interactions?
coherent and thomson scattering
Distance traveled divided by the time needed to cover the distance is the formula to find? D/T=
Velocity
The force that holds the protons and neutrons together in the nucleus is called
nuclear binding energy
The ability to do work due to the separation of charges is called?
electric potential
What type of envelopes is arcing a problem for?
glass envelopes
If a filament electron leaves the tungsten atom with 15 keV of energy and the brems photon produced was 65 keV, how much energy did the incoming filament electron have?
80 keV
Early on, the excessive radiation exposure to many operators and patients resulted in radiation burns, a delayed response to the exposure. What is the name for these burns?
acute radiodermitis
What is the speed of light in which all members of the electromagnetic spectrum travel?
3 x 108 m/s
How is ohms law written?
V=IR
Why is copper used in a rotating anode?
It is a good conductor
92 kvp
What are some examples of derived quantities?
Velocity, acceleration, force, momentum, work and power
Particulate radiation includes
alpha and beta particles
A material that is strongly attracted to a magnetic field is?
ferromagnetic
How many turns does the induction motor turn the rotor in a general purpose tube
3400 rpm
How much energy does a Compton scatter photon retain regardless of interaction?
two thirds of its energy retained.
The standard radiologic unit that quantifies occupational exposure or dose equivalent is the
Rem
How is half-life defined?
The time it takes for half the remaining in an amount of a radioactive element to decay
filament circuit
What is the formula for heat units?
heat units (HU) = kvp x mA x s x c
In which interaction does the energy of the incident photon have to be equal to or greater than the binding energy of a inner shell electron
Photoelectric interactions