This course includes the study of atomic theory, principles associated with matter, energy, basic electricity, magnetism, and electromagnetism. Students develop basic electrical circuits and calculate the relationship between potential difference, current, and resistance. Emphasis is placed on the construction and principles of generators, transformers, rectifiers, and controlling components. The basic schematic x-ray circuit is studied in detail. The construction of x-ray tubes, tube rating, and measures used to extend x-ray tube life are included.