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RAD106 exam 2 review
| Question | Answer |
|---|---|
| An x-ray photon is a quantum of __________ energy. | electromagnetic |
| Visible light is identified by __________ and x-rays are identified by ___________. | wavelength, energy |
| __________ is the distance from one crest to another, from one valley to another, or from any point on the sine wave to the next corresponding point. | wavelength |
| At a given velocity, wavelength and frequency are _____________ proportional. | inversely |
| Structures that absorb x-rays are ______________ and structures that transmit x-rays are __________. | radiopaque, radiolucent |
| X-rays are usually identified by their __________. | energy |
| Gamma rays are produced in the ___________ of the atom. | nucleus |
| The diagnostic range of x-ray energy is _____________. | 30 to 150 kVp |
| A hertz (Hz) is equal to _____ cycle(s) per second. | 1 |
| The four properties of photons are ________, ________, ________ and ________. | frequency, wavelength, velocity, and amplitude |
| The smallest quantity of any type of electromagnetic radiation is a(n) ________. | photon |
| Electrostatics is the study of __________ electric charges. | stationary |
| Electrodynamics is the study of __________ electric charges. | mobile |
| The autotransformer has one winding and is used to vary ________ and __________. | voltage and current |
| According to Faraday’s law, the magnitude of the induced electric current depends on which factor? | the variation of magnetic field intesity |
| What type of material can be made magnetic when placed in an external magnetic field? | ferromagnetic |
| A charged particle in motion creates a(n) ______________. | magnetic field |
| What is the unit of electric potential? | volt |
| An alternating (AC) current is represented by a __________ line. | sinusoidal |
| Electrostatic force is _________ proportional to the distance between charges, and _______ proportional to the product of the charges. | inversely and directly |
| What is Ohm’s law? | I=V/R I=CURRENT V=VOLTS R=RESISTANCE |
| Like charges _______ and unlike charges _______. | repel and attract |
| What is the SI unit of magnetic field strength? | Tesla |
| A _________ is a source of direct current. | battery |
| Electrification occurs through the movement of ___________. | electrons only |
| Alternating current is produced by a ___________. | generator |
| Electrical power is measured in _____. | watts |
| The smallest unit of electrical charge is the __________. | electron |
| Approximately _____ of the kinetic energy of electrons from the cathode is converted to heat. | 99% |
| How does added filtration affect the emission spectrum? | reduce amplitude and shift to the right |
| A 15% increase in kVp is equivalent to ___________________. | doubling the mAs |
| Characteristic K-shell x-rays have an effective energy of _____ keV. | 69 |
| Most of the x-rays produced at the target are _______________. | bremsstrahlung |
| At 55 kVp, _____ of the x-rays produced are bremsstrahlung. | 100% |
| The useful characteristic x-rays from tungsten targets are ___-shell x-rays. | k |
| The production of heat at the anode is directly proportional to _________. | tube current |
| Approximately _____ of the kinetic energy of the projectile electrons is converted to x-rays at the target. | 1% |
| Projectile electrons travel from ______________. | cathode to anode |
| The quantity of bremsstrahlung radiation increases proportionately with increased _____. | mAs |
| An exposure taken at 100 kVp would have a continuous emission spectrum with a maximum energy of _____ keV. | 100 |
| Bremsstrahlung x-rays are produced by ______________ at the target. | slowing electrons |
| The efficiency of x-ray production increases as ______ increases. | kVp |
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travis686