| A | B |
|---|
| The force exerted by a magnet. | Magnetism |
| One of two ends of a magnet where the force is the stronges. Every magnet has two. | Magnetic pole |
| An area surrounding a magnet within which the magnet can exert a force. Magnetic fields are concentrated into a pattern of lines that extend from the magnet's north pole to its south pole. | Magnetic field |
| A magnet that consists of a piece of iron or steel inside a coil of current-carrying wire | Electromagnet |
| A device that converts kinetic energy, or the energy of motion, into electrical energy | Generator |
| Electric current that flows in one direction only | Direct current |
| Electric current that reverses direction at regular intervals | Alternating current |
| A device that uses electromagnetism to increase or decrease voltage | Transformer |
| The rate at which electrical energy is generated from, or converted into, another source of energy, such as kinetic energy | Electric power |
| The unit of measurement for power, which is equal to one joule of work done or energy transferred in one second | watt |
| The unit of measurement for electrical energy equal to one kilowatt of power over a one-hour period | Kilowatt-hour |
| A continuous flow of electric charge, which is measured in amperes | Electric current |
| A closed path through which charge can flow | Circuit |
| The energy of motion | Kinetic energy |
| An object that attracts certain other materials, particulary iron and steel. | Magnet |
| A group of atoms whose magnetic fields align, or point in the same direction. | Magnetic domain |
| Electric charge | A property that allows one object to exert an electric force on another object without touching it |
| Electric field | An area surrounding a charged object, within which the object can exert an electric force on another object without touching it |
| Static charge | The buildup of electric charge in an object caused by the uneven distribution of charged particles |
| Induction | The buildup of a static charge in an object when the object is close to, but not touching, a charged object |
| Electric potential | The amount of potential energy per unit charge that a static charge or electric current has |
| Volt | The unit of measurement for electric potential, which is equal to one joule per coulomb |
| Conductor | A material that transfers energy easily |
| Insulator | A material that does not transfer electric charge easily |
| Resistance | The property of a material that determines how easily a charge can move through it; measured in ohms |
| Ohm | The unit of measurement for electrical resistance |
| Grounding | The creation of a harmless, low-resistance path - a ground - for electricity to follow |
| Electric current | A continuous flow of electric charge, which is measured in amperes |
| Ampere | The unit of measurement of electric current, which is equal to one coulomb per second. |
| Ohm's Law | The mathematical relationship amoung current, voltage, and resistance, expressed in the formula I=V/R |
| Electric cell | A device that produces electric current using the chemical or physical properties of different materials |
| Circuit | A closed path through which charge can flow |
| Resistor | An electrical device that slows the flow of charge in a circuit |
| Short circuit | An unintended and undesired path connecting one part of a circuit with another |
| Series circuit | A circuit in which current follows a single path |
| Parallel circuit | A circuit in which current follows more than one path |
| Electronic | Operating by means of an electrical signal |
| Binary code | A coding system in which information is represented by two figures, such as 1 and 0 |
| Digital | Represented by numbers |
| Analog | Represented by a continuous but varying quantity, such as a wave |
| Computer | An electronic device that processes digital information |
