click below
click below
Normal Size Small Size show me how
Electrical Careers
| Question | Answer |
|---|---|
| battery | a device that stores chemical energy and converts it into electrical energy to power a circuit |
| current | a measure of how fast electrical energy is flowing through a circuit |
| open circuit | an incomplete electrical path where electricity cannot flow because there is a gap or break in the circuit |
| closed circuit | a series of wires or electric devices that form a closed path for the flow of electricity |
| motor | a device which converts electricity into mechanical motion. |
| electrical power | the rate at which electrical energy is transferred, used, or converted into another form of energy (like light, heat, or motion) in a circuit |
| mechanical power | the rate at which mechanical work is performed, typically involving physical movement, force, torque, or the displacement of an object. |
| resistance | anything that opposes the flow of electricity in a circuit. The wires in a circuit provide some resistance, as do lamps, motors, speakers, LEDs, transistors, and integrated circuits. It is expressed in ohms. |
| series circuit | a circuit with only one path for electricity to flow through. All of the parts in a series circuit are connected one after the other. The light bulbs in a series circuit become dim as more lights are added. When resistance increases, current decreases. |
| parallel circuit | a circuit with a number of separate paths for electricity to flow through. |
| voltage | a measure of how strong an electric charge between materials is. It can be thought of as the electrical pressure pushing electric current through a circuit. It is expressed in volts |
| inertia | an object's natural tendency to resist any change in its state of motion |
| LED (Light Emitting Diode) | A diode allows electricity to flow in only one direction, and only if the voltage exceeds a turn-on threshold. LEDs have a semiconductor inside, a material which only allows some electricity to flow. |
| semiconductor | a material, usually silicon, which only lets some electrons flow through it |
| terminals | the point where connections are made to an electrical device. For example, a dry cell has two terminals. One is positive and the other is negative. |
| conductor | materials such as metals with loosely held electrons in their atoms |
| insulator | materials which do not allow electric current to flow through them under normal conditions. Examples are glass, rubber, and plastic. |