| A | B |
|---|
| Alternating current (AC) | The flow of electrical current that reverses direction |
| Amperes | A measurement of the # of electrons passing a given point each second |
| Atom | Consists of a nucleus containing protons and neutrons and surrounding electrons |
| Bohr's Theory | Theory identifying a positively charged nucleus around which revolves 1 or more electrons |
| Circuit | The complete path of an electric current |
| Conductor | Materials which allow the flow of free electrons. Metals (copper, gold, silver) and water |
| Current | The rate of electron flow. Measured in amperes |
| Direct current (DC) | Electric current flows in one direction, from - to + pole |
| Electric shock | Occurs when the body becomes part of an electrric circuit. Varies in severity |
| Electrical charge | Positive or negative. Too many or too few electrons on an atom |
| Electricity | A form of energy generated by the ineraction of positive and negative charges |
| Electrocution | Occurs when an individual becomes the component that closes a circuit through which a lethal current may flow |
| Electron Theory | Principles that govern the behavior of electrons |
| Electrons | Negative charged particles that travel in concentric orbits/shells around the nucleus of an atom |
| Element | A substance that cannot be separated into substances different from itself |
| Equipotential grounding system | Designed to eliminate voltage differences between all conductive surfaces near the patient |
| Free electrons | The outer electrons of an atom. Have a less attraction for the protons, move to another atom |
| Frequency | The number of complete cycle per second of alternating current |
| Ground | An object that makes an electrical connection with the earth |
| Ground wire | The 3rd prong of a 3-prong plug. Safely conveys any leaking electrons to the ground. prevents injury |
| Grounding | Necessary component for all electrical equipment in order to ensure safe use and prevent stray current leakage |
| Hertz | Term used to identify one complete AC cycle |
| Hot wire | An ungrounded conductor that carries electrical current from the source. Connects to the switch |
| Insulator | Materials that inhibit the flow of electrons. Rubber and plastic |
| Isolation power system | Used in hazardous locations. Transformer isolated the electrical circuits from ground |
| Law of electrical charges | Like charges repel each other, unlike charges attract |
| Load | The device that uses the electricity to perform some function. |
| Matter | Anything that has mass and occupies space |
| Neutral wire | Serves as a pathway for electrons/electrical current to return to the energy source, completing the circuit |
| Neutrons | Located in the nucleus of an atom, neither + or - |
| Nucleus | The center portion of an atoms, contains protons and neutrons |
| Ohm's Law | Mathematical equation showing the relationship between voltage, current, and resistance |
| Protons | Positively charged particles located in the nucleus |
| Radio frequency | Electromagnetic waves that travel through the atmosphere. Radio and T.V. signals |
| Receptacle | The electrical outlet. Female electrical fitting containing the live parts of the circuit |
| Resistance | Measurement of opposition to the flow of electrons through materials. Measured in ohms |
| Switch | Device used to open or close a circuit, controls the flow of electricity |
| Voltage | Causes current to flow by forcing (force) electrons through material |
| Volts | The unit used to measure electrical force between 2 points in a circuit. |
