Physics I and II Flash Cards
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| What is the smallest particle of an element that has the characteristic properties of that element? | Atom - p. 38
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| 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
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| What does an x-ray tube filament emit when heated? | Electrons - p.122
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| 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
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| What does an atom's atomic number (or "Z" number) indicate? | The number of protons in it's nucleus. - p.41
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| An ionic bond is the _____ of electrons whereas a covalent bond is the _____ of electrons. | Transfer, Sharing - p.48
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| What is another term for "Body Section Radiography"? | Tomography - Ppt. from Physics I
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| In tomography, what is section thickness determined by? | Tomography angle - p.268
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| _____ _____ invented the fluoroscope in ____. | Thomas Edison, 1898 - p.8
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| Are rods or cones responsible for photopic vision? | Cones - p.348
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| What is the term for the emission of electrons due to stimulation from light? | Photoemission - p.350
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| The output phosphor of a fluoroscopic image-intensifier tube produces approximately how much more light than the input phosphor? | 50 times more - p.351
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| What are the 3 causes of attenuation? | 1.) Absorption (characteristic radiation).
2.) Scatter (Compton, Coherent)
3.) Inverse Square Law
- p.175
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| True or False, with Compton scattering, the photon that is given off is equal in energy to the incident photon. | True - p.163
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| What is the term for "the smallest quantity of any type of electromagnetic energy?" | Photon - p.57
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| What controls the number of electrons that are released during thermionic emission? | mA - p.106
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| What controls the velocity at which electrons move from cathode to anode? | kVp - p.106
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| 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
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| 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
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| What turns the anode inside the x-ray tube? | An electromagnetic induction motor - p.127
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| Any charged particle in motion creates a _____ | Magnetic field - p.83
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| In the right hand rule of electromagnetism, what does the thumb indicate? | The direction that the current is flowing.
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| 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
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| True or False, a transformer changes the intensity of alternating voltage and current. | True - p.93
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| A coil of wire is called a what ____? | Solenoid - p.90
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| Varying magnetic field intensity induces what ____? | An electric current - p.91
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| How many windings does an autotransformer contain? | One - p.105
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| What control panel setting controls the quality of the x-ray beam? | kVp - p.106
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| Primary voltage is lower than secondary voltage in which type of transformer? | Step-up transformer - p.95
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