LRA 211 Week 1 test questions fully solved & updated 2024-2025.docx, Exams of Biology

Download LRA 211 Week 1 test questions fully solved & updated 2024-2025.docx and more Exams Biology in PDF only on Docsity! LRA 211 Week 1 test questions fully solved & updated 2024- 2025 As the frequency of electromagnetic radiation decreases, wavelength will ? increase 3 multiple choice options Which of the following members of the electromagnetic spectrum has the ability to ionize matter? X-rays 3 multiple choice options Previous Pause Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Which of the following is not within the wavelength range of electromagnetic radiation? 10 ^−24 3 multiple choice options Which member of the electromagnetic spectrum has the longest wavelength? Radiowaves 3 multiple choice options A diagnostic x-ray photon has a frequency of 2.42 × 1019 Hz. What is its wavelength? 1.24 × 10^−11 m What is the maximum number of electrons that will occupy the outermost shell of an atom? 8 3 multiple choice options We have an expert-written solution to this problem! The maximum number of electrons that can occupy the P shell is ? 72 3 multiple choice options Atoms that bind together because of their opposite charges form ionic bonds 3 multiple choice options The horizontal periods of the periodic table contain elements with ? the same number of electron shells 3 multiple choice options Which of the following reduces leakage radiation to required standards? protective housing 3 multiple choice options Which component of the x-ray tube is responsible for concentrating the electron cloud? focusing cup 3 multiple choice options The x-ray tube is a part of the ? x-ray circuit secondary 3 multiple choice options A technique of 80 kV, 400 mA, 0.8 seconds is to be used on a 3-phase, 12-pulse machine. How many heat units are produced with a single exposure? 36,096 3 multiple choice options The intensity of the x-ray beam is less on the anode side. 3 multiple choice options Causes of tube failure are most often related to which of the following? thermal characteristics 3 multiple choice options What metal is added to the filament to increase thermionic emission and extend tube life? thorium 3 multiple choice options A small anode target angle results in an increase in anode heel effect 3 multiple choice options A dual focus tube refers to a tube with two filaments 3 multiple choice options The purpose of the line focus principle is to create which of the following? large actual and small effective focal spot size 3 multiple choice options A technique of 50 kV, 100 mA, 0.1 seconds is to be used on a 3-phase, 6-pulse machine. How many heat units are produced with a single exposure? 675 alpha particle a type of nuclear radiation consisting of two protons and two neutrons. do not travel very far, because they are relatively large and cannot penetrate most objects. beta particle An fast moving electron that is emitted from an unstable nucleus with the ability to ionize matter. electromagnetic radiation The energy transferred through space by electromagnetic waves. electromagnetic spectrum All of the frequencies or wavelengths of electromagnetic radiation Frequency The number of complete waves that pass a given point in a certain amount of time gamma rays Electromagnetic waves with the shortest wavelengths and highest frequencies Hertz (Hz) Unit of measurement for frequency infrared light electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves inverse square law the intensity of radiation is inversely proportional to the square of the distance from the source of radiation ionazation the process of adding or removing electrons from an atom or molecule, which gives the atom or molecule a net charge microwave very short electromagnetic wave Particulate radiation tiny particles of matter that possess mass and travel in straight lines and at high speeds Photon a particle of electromagnetic radiation having zero mass and carrying a quantum of energy. Light Planck's constant A mathematical value used to calculate photon energies based on frequency and equal to 4.135 × 10−15eV sec. Radioactivity the process by which an atom with excess energy in its nucleus emits particles and energy to regain stability Radiowaves an electromagnetic wave that has the longest wavelength and has the least energy Ultraviolet Light (UV) part of the electromagnetic spectrum that consists of waves with frequencies higher than those of visible light and lower than those of x-rays visable light the portion of the electromagnetic spectrum that is visible to the human eye Wavelength