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Andy Shaw Stack
Physics I and II Flash Cards
| Question | Answer |
|---|---|
| What is the smallest particle of an element that has the characteristic properties of that element? | Atom - p. 38 |
| What is the primary difference between a simple and a complex substance? | A simple substance can not be broken down into simpler substances. - p.38 |
| What does an x-ray tube filament emit when heated? | Electrons - p.122 |
| Given the formula 2(n squared) where n is the number of an atom's outer shell, what is the maximum number of electrons that the "K" shell can hold? | 2 - K is the first shell of an atom so; 1 squared = 1 and 2 * 1 = 2. - p.43 |
| What does an atom's atomic number (or "Z" number) indicate? | The number of protons in it's nucleus. - p.41 |
| An ionic bond is the _____ of electrons whereas a covalent bond is the _____ of electrons. | Transfer, Sharing - p.48 |
| What is another term for "Body Section Radiography"? | Tomography - Ppt. from Physics I |
| In tomography, what is section thickness determined by? | Tomography angle - p.268 |
| _____ _____ invented the fluoroscope in ____. | Thomas Edison, 1898 - p.8 |
| Are rods or cones responsible for photopic vision? | Cones - p.348 |
| What is the term for the emission of electrons due to stimulation from light? | Photoemission - p.350 |
| The output phosphor of a fluoroscopic image-intensifier tube produces approximately how much more light than the input phosphor? | 50 times more - p.351 |
| What are the 3 causes of attenuation? | 1.) Absorption (characteristic radiation). 2.) Scatter (Compton, Coherent) 3.) Inverse Square Law - p.175 |
| True or False, with Compton scattering, the photon that is given off is equal in energy to the incident photon. | True - p.163 |
| What is the term for "the smallest quantity of any type of electromagnetic energy?" | Photon - p.57 |
| What controls the number of electrons that are released during thermionic emission? | mA - p.106 |
| What controls the velocity at which electrons move from cathode to anode? | kVp - p.106 |
| What is the purpose of the focusing cup of an x-ray tube? | The focusing cup confines the negatively charged electron beam so that it hits a small area of the anode. - p.123 |
| When considering the "Heel Effect" which side of the tube should the part of more thickness be on, the cathode side or the anode side? | Cathode - pp.129-131 |
| What turns the anode inside the x-ray tube? | An electromagnetic induction motor - p.127 |
| Any charged particle in motion creates a _____ | Magnetic field - p.83 |
| In the right hand rule of electromagnetism, what does the thumb indicate? | The direction that the current is flowing. |
| What is Faraday's law (AKA The first law of electromagnetics)? | An electric current is induced in a circuit if some part of that circuit is in a changing magnetic field. - p.91 |
| True or False, a transformer changes the intensity of alternating voltage and current. | True - p.93 |
| A coil of wire is called a what ____? | Solenoid - p.90 |
| Varying magnetic field intensity induces what ____? | An electric current - p.91 |
| How many windings does an autotransformer contain? | One - p.105 |
| What control panel setting controls the quality of the x-ray beam? | kVp - p.106 |
| Primary voltage is lower than secondary voltage in which type of transformer? | Step-up transformer - p.95 |
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