working direct current
61New Zealand — New Zealander. /zee leuhnd/ a country in the S Pacific, SE of Australia, consisting of North Island, South Island, and adjacent small islands: a member of the Commonwealth of Nations. 3,587,275; 103,416 sq. mi. (267,845 sq. km). Cap.: Wellington …
62British Rail Class 74 — Infobox Locomotive name = British Rail Class 74 powertype = Electro diesel caption = 74 003 in BR blue with full yellow ends builder = British Railways’ Doncaster Works; rebuilt BR Crewe Works builddate = 1958–1960; Rebuilt 1967–1968 gauge =… …
63Avalanche transistor — An Avalanche Transistor is a bipolar junction transistor designed for operation in the region of its collector current/collector to emitter voltage characteristics beyond the collector to emitter breakdown voltage, called avalanche breakdown… …
64Oil shale extraction — is an industrial process in which kerogen mdash;a mixture of organic chemical compounds (including hydrocarbons) found in oil shale mdash;is converted into synthetic crude oil through pyrolysis. In pyrolysis, oil shale is heated in the absence of …
65electromagnetism — /i lek troh mag ni tiz euhm/, n. 1. the phenomena associated with electric and magnetic fields and their interactions with each other and with electric charges and currents. 2. Also, electromagnetics. the science that deals with these phenomena.… …
66Mercury-arc valve — Mercury rectifier on display in Beromünster, Switzerland before being decommissioned A mercury arc valve (mercury vapor rectifier) is a type of electrical rectifier used for converting high voltage or high current alternating current (AC) into… …
67Coal — Sedimentary Rock Anthracite coal Composition Primary carbon Secondary hydrogen, sulfur …
68Cassini–Huygens — Artist s concept of Cassini s Saturn Orbit Insertion Operator NASA / ESA / ASI Mission type …
69Intermittent power source — [ Erie Shores Wind Farm monthly output over a two year period] An intermittent power source is a source of electric power generation that may be uncontrollably variable or more intermittent than conventional power sources, and therefore non… …
70Dynamo — For other uses, see Dynamo (disambiguation). Dynamo Electric Machine (end view, partly section, U.S. Patent 284,110) A dynamo (from the Greek word dynamis; meaning power), originally another name for an …
