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Mr. Hudak
Physics
| Question | Answer |
|---|---|
| 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 Bushong; p. 59 |
| The study of stationary electric charges. | Electrostatics Bushong; p. 73 |
| Unlike charges _______; like charges _______. | Attract, repel Bushong; p. 75 |
| What is the unit of electric potential? | Volt (V) Bushong; p. 77 |
| The study of electric charges in motion. | Electrodynamics Bushong, p. 78 |
| Any material that does not allow electron flow. | Insulator Bushong; p. 78 |
| Any substance through which electrons flow easily. | Conductor Bushong; p. 78 |
| A material that under some conditions behaves as an insulator and in other conditions behaves as a conductor. | Semiconductor Bushong; p. 78 |
| What is the measurement of electric power? | Watts (W) Bushong; p. 81 |
| What is the best example of a natural magnet? | Earth Bushong; p. 85 |
| What are ferromagnetic materials? | Iron, cobalt, and nickel. These are strongly attracted by a magnet and usually can be permanently magnetized by exposure to a magnetic field. Bushong; p. 85 |
| What are some examples of nonmagnetic materials? | Wood, glass Bushong; p. 86 |
| A coil of wire is connected to a current-measuring device called an _______. | Ammeter Bushong; p. 91 |
| A device that uses the interacting magnetic fields produced by changing electric currents. | Transformer Bushong; p. 93 |
| What does an autotransformer consist of? | An iron core with only one winding of wire about it. Bushong; p. 95 |
| What are the three principle parts of every x-ray imaging system? | X-ray tube, operating console, and high-voltage generator Bushong; p. 103 |
| What is thermionic emission? | The release of electrons from a heated filament. Bushong; p. 106 |
| True or False - kVp determines the quantity of the x-ray beam. | False; kVp determines the QUALITY of the x-ray beam. Bushong; p. 106 |
| What are the three primary parts of the high-voltage generator? | High-voltage transformer, filament transformer, and rectifiers. Bushong; p. 109 |
| The process of converting AC to DC. | Rectification Bushong; p. 110 |
| What is the advantage of the protective housing on the x-ray tube? | Guards against excessive radiation exposure and electric shock. The protective housing also provides mechanical support for the x-ray tube and protects the tube from damage caused by rough handling. Bushong; p. 121 |
| What is the effectiveness of the focusing cup determined by? | Determined by its size and shape, its charge, the filament size and shape, and the position of the filament in the focusing cup. Bushong; p. 122 |
| The negative side of the x-ray tube that has two primary parts: a filament and a focusing cup. | Cathode Bushong; p. 122 |
| What is the positive side of the x-ray tube that conducts electricity, radiates heat, and contains the target? | Anode Bushong; p. 125 |
| What are the most common anode materials? | Copper, molybdenum, and graphite Bushong; p. 125 |
| What are the two principle parts of the induction motor? | Stator, rotor Bushong; p. 127 |
| What is the most frequent cause of abrupt tube failure? | Electron arcing from filament to enclosure due to vaporized tungsten. Bushong; p. 133 |
| Approximately _____% of the kinetic energy of projectile electrons is converted to heat. | 99% Bushong; p. 140 |
| In the diagnostic range, most x-rays are _______ x-rays. | Brehmsstrahlung Bushong; p. 143 |
| How are brehmsstrahlung x-rays produced? | By the slowing down of an electron by the target atom's electrostatic nuclear field. Bushong; p. 149 |
| True or False - Compton scattered x-rays are useful to the x-ray image. | False; compton scattered x-rays contribute no useful information to the image. Bushong; p. 170 |
| The total reduction in the number of x-rays remaining in an x-ray beam after penetration through a given thickness of tissue. | Attenuation Bushong; p. 175 |
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