Semester 2 Physics exam 1 Flashcards
Electric motor in which the rotor is a series of wires loops but the external magnetic field is supplied by several fixed electromagnets called stators
Induction motor
Voltage is increased from primary side to secondary
Step up transformer
Process of converting AC to DC
Rectification
Located in operating consul controls KVP consists of one winding of wire and varies voltage and current by self induction
Auto transformer
Rate of change of an objects position over time (speed)
Velocity
Number of cycles or wavelengths of a simple harmonic motion per unit time expressed in hertz
Frequency
Distance between similar points on a sine wave the length of One cycle
Wavelength
Continuum of electromagnetic energy
Electromagnetic spectrum
Oscillating electric and magnetic fields travel in a vacuum with the velocity of light. includes x-rays Gamma Rays and non-ionizing radiation parentheses ultraviolet visible infrared radio waves
Electromagnetic radiation
Width of light wavelength
Amplitude
Material can serve as a conductor and as an insulator of electricity
Semiconductor
Determines radiation exposure during radiography
AEC
Emission of electrons from a heated surface
Thermionic emission
What are the three main components of the x-ray imaging system?
High voltage generator, operating console , x-ray tube
Allows flow in one direction only
Diode
What is matter?
anything that takes up space
What is mass?
Quantity amount of matter in an object
What is radiation?
Transfer of energy
What is an atom?
Building block of matter
The closer to the nucleus The shell is tighter the bond of electrons
Binding energy
What are the two types of ionizing radiation? And their subparticles
Particulate (alpha and beta) and electromagnetic (gamma and x-rays)
X-rays are useful because of
Low penetrability and low ionization
The shorter the wavelength the _____ the frequency
Higher
Who developed the quantum theory and what is the formula?
Max Planck E =HF
Bundle of energy
Quantum
What is ohms law
Velocity equals amperes times resistance V=IR
What percentage of the voltage ripple are wave in full wave?
100%
What percentage of voltage ripple are 3 phase &6 pulse
14%
What percentage of voltage ripple are 3 phase 12 pulse?
4%
Percentage of voltage ripple for high frequency
1%
In the electromagnetic spectrum cameras in x-rays are _____ energy
High
In the electromagnetic spectrum radio frequency and microwaves are _____energy
Low
Is bone radiopaque or radiolucent?
Radiopaque
Are lung tissue and soft tissue radio Lucent or radiopaque?
Radiolucent
The inverse square law may be applied when
Distance changes
What occupies a small segment of the electromagnetic spectrum?
Visible light
When compared with visible light x-rays have shorter
Wavelength
What has the shortest wavelength?
Gamma rays
______ _______ has greater penetrating ability
Electromagnetic radiation
Flows in only One Direction
Direct current
Electrons flow alternatively in opposite directions
Alternating current
Has low energy and long wavelength
Radio frequencY
demonstrated that electricity can be used to generate magnetic fields
Oersteds experiment
To induce a current with use of a magnetic field the magnetic field can’t be constant must be changing
Faradays law
Powers that rotating anode of x-ray tube
Induction motor
A transformer operates only with a _____ Electric current . AC or DC?
Changing AC
Measures voltage provided to the x-ray imaging system and adjust that voltage to 220 V
Line compensator
Where is the lien compensator located
Operating consul
What is the most accurate most sophisticated and complicated timer
Electronic
Secondary voltage higher than primary
High frequency transformer
Produces nearly constant potential voltage waveform improving image quality at lower patient dose
High frequency generator
Outer shell of an Atom
Valance
Alpha particles represent hi ionizing radiation with _____ range
Short
Beta particles do not ionize so readily and have a blank range
Longer
X-rays have a ______ ionization rate and a very _____ range
Low & long
