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1AC power plugs and sockets — See also: Industrial and multiphase power plugs and sockets Plugs and sockets may sometimes combine male and female contacts, but t …
2List of vacuum tubes — This is a list of vacuum tubes or thermionic valves. Before the advent of semiconductor devices, hundreds of tube types were used in consumer and industrial electronics; today only a few types are still used in specialized applications. Contents… …
3Overhead power line — This article is about power lines for general transmission of electrical power. For overhead lines used to power road and rail vehicles, see Overhead lines. Transmission lines in Lund, Sweden …
4Maritime mobile amateur radio — An emergency portable boat radio transceiver, Museal ship S/S Sołdek in Gdańsk, Poland Most countries amateur radio licences allow licensed operators to install and use radio transmission equipment while at sea. Such operation is known as… …
52011 Syrian uprising — Part of the Arab Spring Protest in Hama, a city in northwestern Syria (22 July 2011) …
6Lightning rod — A lightning rod (USA) or lightning conductor (UK) is a single component in a lightning protection system. In addition to rods placed at regular intervals on the highest portions of a structure, a lightning protection system typically includes a… …
7Fluorescent lamp — A fluorescent lamp or fluorescent tube is a gas discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light.Unlike… …
8Perm (hairstyle) — A permanent wave, commonly called a perm, is the chemical and/or thermal treatment of hair to produce waves or curls. The use of the word permanent is justified insofar as when the wave is permed, it remains so; however, as the hair grows, the… …
