RADIOGRAPHY HESI PRACTICE ACTUAL EXAM NEWEST 2024 COMPLETE 200 QUESTIONS AND CORRECT VERIFIED ANSWERS |ALREADY GRADED A+ Who discovered x -rays? - ANSWER -Wilhelm Konrad Roentgen What are 9 characteristics of x -rays? - ANSWER -1. the ability to penetrate o paque substances 2. the ability to affect silver halide salts on films in the same manner as light does 3. the ability to stimulate or destroy tissue by ionization 4. they travel at a constant speed, the speed of light 5. they cause fluorescence 6. the y are high energy waves 7. they travel as electromagnetic waves or energy 8. they have no mass 9. they travel in a straight line and are invisible What is an electric current? - ANSWER -the flow of electrons from one point to another or through a conductor What is an electric current measured in? - ANSWER -amperes What is a direct current? - ANSWER -current flowing in one direction, that is, from positive and negative. Direct current can be interrupted at certain set intervals What is ionization? - ANSWER -The production of ions by the removal of electrons from the atoms of the matt er that is struck by the x -rays When does ionization occur? - ANSWER -whenever x -rays penetrate matter What is kilovoltage usually designated as? - ANSWER -Kilovoltage peak (kVp) What is kilovoltage? - ANSWER -the measure of the force between the negative cathode and the positive anode and controls the energy of the electrons striking the tungsten target. What does kilovoltage control? - ANSWER -the penetrating ability of the x -rays
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