REVIEW QUESTIONS I. As the frequency of electromagnetic radiation decreases, 6. A photon has a wavelength...

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(or current) through eleci up transformer increases voltage and a step-dl former decreases voltage The x-ray circuit is divided into three main sections: primary circuit, the secondary circuit, and the filament tthrough the rheostat, to the step to the selected filament within th tube. Both halves of this sequence to set up the environment in the X-to d. coulomb. The removal of electrons from an ob with another is electrification by a. contact b. friction c. induction. . 3. circuit the kVp selector of the operating console, which creates a CRITICAL THINKING QUESTIONS . The radiographer controls the autotransformer through d. grounding ity manipulated and machine to ultimately produce x-raye 2. How is electricity mani 1. What are the sequences of events through the primary. secondary, and filament sections of the x-ray circuit when a set of exposure factors are selected 5. REVIEW QUESTIONS 3. Which of the following is Coulombs la a. Like charges repel, unlike charges atad b. Electrostatic force between charges is tional product of quantities and i tional square of distance between thes c. Electri harges reside only on the em I. An x-ray tube is an example of current flow in a/an: a. gas b. vacuum. c. metallic conductor. d. ionic solution. 6. 2. Which of the following increases or decreases voltage bya fixed amount a. capacitor b. rheostat c. diode conductOrS d. Only positive charges can move in sold d. transformer

CHAPTER 4 The X-ray Circuit 49 xposure (like a timer) monly used tod REVIEW QUESTIONS-contd that is placed betwee rs in the chamber, a are arranged to DC. This pr hase waveforms, A rheostat will: a. provide electric potential b. vary resistance. c. increase or decrease voltage. d. provide infinite resistance. In a metallic conductor: a. electrons move on external surface. b. electrons move internally c. protons move on external surface. d. protons move internally Nearly all discussion of electricity deals with the move- ment of a. positive charges. b. negative charges. c. neutrons. d. all of the above. 10. Which of the following allows electrons to flow in only s the radiation one direction? mber, ionization occu exits th b, rheostat c. battery d. diode 11. Which of the following is a unit of measure of current a. ampere b. volt c. Coulomb d. ohm the same way each ti This process 12. Magnetic flux is a. magnetic material. b. groups of smaller magnets. c. curved lines of force in space. ntage of ripple in the d. the magnetizing of other materials use of high-frequ rther still. attracted to magnets? . Which of the following conditions or environments will 13. What is the magnetic classification of milliamperage on the justing this rheostat, provide the least resistance? a. glass material b. long conductor c. large cross-sectional area d. high temperature of conductor b. ferromagnetic c. paramagnetic d. no such classification the filament ci a. A applied to the filan mA station number, 1 ampere in a circuit with a resistance of 1 ohm is the definition of a. ampere b. volt. 8. The potential difference that will maintain a current of 14. The unit of measure for electric potential is c.Ω d. W ough the primary a the autotransform c. ohm. d. coulomb. the rectifiers, to t f events through t 9. The removal of electrons from an object by rubbing it with another is electrification by: he autotransform n transformer, a hode of the x a. contact. b. friction. c. induction d. grounding. n simultaneous be that produce

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