| A | B |
|---|
| electric current | The flow of electric charges through a material. |
| static electricity | A buildup of charges on an object. |
| current electricity | A wave that requires a medium through which to travel. |
| alternating current (AC) | Current consisting of charges that move back and forth in a circuit. |
| direct current (DC) | Current consisting of charges that flow in only one direction in a circuit. |
| electric circuit | A complete path through which electric charges can flow. |
| series circuit | An electric circuit with only one path for the current to take. |
| parallel circuit | An electric circuit with several paths for the current to take. |
| resistance | The opposition to the movement of electric charges flowing through a material. |
| friction | A force that one surface exerts on another when the two rub against each other. |
| magnetic | A characteristic of those metals that are attracted to magnets and can be made into magnets. |
| magnet | A piece of iron (ore, alloy, or other material) that exhibits properties of magnetism such as attracting other iron-containing objects. |
| electromagnet | A solenoid with a ferromagnetic core that forms a magnet that can be turned on and off. |
| electric motor | A device that converts electrical energy into mechanical energy to turn an axle. |
| electric generator | A device that converts mechanical energy into electrical energy. |
| magnetic field | The region around a magnet where the magnetic field is exerted. |
| conductor | A substance through which electrons move freely, transmitting heat or electricity. |
| semiconductor | A substance that can conduct electricity under some conditions. |
| insulator | A material that does not easily transfer thermal energy or electric current between its particles. |
| diode | A solid-state component that consists of layers of semiconductors that allow current to flow in only one direction. |
| solar cell | A device converting solar energy into electricity. |
| IR | Infrared light |
| UV | Ultraviolet light |
| LED | Light emitting diodes emit visible light or infrared radiation when current passes through them. |
| transistor | A device that either amplifies an electronic signal or switches current on and off. |
| silicon | Semiconductor |
| voltage | The difference in electrical potential between two pieces. |
| magnetic pole | The end of a magnetic object, where the magnetic force is the strongest. |
| transmitter | Infrared TV remote or the lighting course behind the screen in an LED TV or notebook computer screen. |
| electric charge | A property of electrons and protons; electrons carry a negative charge; protons carry a positive charge. |
| magnetism | The force of attraction or repulsion of magnetic materials. |
