step-up and step-down power transformers
71Mains electricity — A table lamp connected to a wall socket (the mains). Mains is the general purpose alternating current (AC) electric power supply. In the US, electric power is referred to by several names including household power, household electricity,… …
72History of electromagnetism — The history of electromagnetism, that is the human understanding and recorded use of electromagnetic forces, dates back over two thousand years ago, see Timeline of electromagnetism. The ancients must have been acquainted with the effects of… …
73Guitar Hero — For the first game in the series, see Guitar Hero (video game). For other uses, see Guitar Hero (disambiguation). Guitar Hero Genres Rhythm game …
74WOMAN — This article is arranged according to the following outline: the historical perspective biblical period marriage and children women in household life economic roles educational and managerial roles religious roles women outside the household… …
75Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
76Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …
77Christmas lighting technology — has been subject to considerable development and variation since the replacement of candles by electric lights. Contents 1 Incandescent Christmas Lights 2 LEDs 3 Fiber optic lights 4 B …
78April Fools Day 2008 — April 1, 2008 was an April Fools Day falling on a Tuesday. In newspapers, magazines and news websites * About.com s Car Reviews posted a fake story that Toyota had announced a new 256 horsepower V6 Prius to accommodate the needs of car buyers… …
79Effects unit — A pedalboard allows a performer to create a ready to use chain of multiple pedals. Signal chain order: tuner, compressor, octave generator, wah wah pedal, overdrive, distortion, fuzz, EQ and tremolo. Effects units are …
801990s — 90s redirects here. For decades comprising years 81–90 of other centuries, see List of decades. This article is about the decade. For the band, see 1990s (band) …
