ground-loop currents
61Protective relay — See also: Power system protection In electrical engineering, a protective relay is a complex electromechanical apparatus, often with more than one coil, designed to calculate operating conditions on an electrical circuit and trip circuit breakers …
62Electromagnetic pulse — Ebomb redirects here. For EBOM, see Engineering bill of materials. This article is about the general weapons effect. For other uses, see the more specific topic (for example, Electromagnetic forming) An electromagnetic pulse (sometimes… …
63Diode — Figure 1: Closeup of a diode, showing the square shaped semiconductor crystal (black object on left) …
64Thermocline — Aquatic layers Pelagic    Photic       Epipelagic …
65Houston — This article is about the U.S. city. For other uses, see Houston (disambiguation). City of Houston   City   …
66Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …
67Houston, Texas — Infobox Settlement official name = City of Houston settlement type = City nickname = Space City imagesize = image caption = image #ifeq:Houston, Texas|Houston, Texas|Seal of Houston, Texas.png| mapsize = 250px map caption = Location in the state… …
68Mass driver — For fictional mass drivers, see List of electromagnetic projectile devices in fiction. Artist s conception of a mass driver for lunar launch A mass driver or electromagnetic catapult is a proposed method of non rocket spacelaunch which would use… …
69Current sea level rise — This article is about the current and future rise in sea level associated with global warming. For sea level changes in Earth s history, see Sea level#Changes through geologic time. Sea level measurements from 23 long tide gauge records in… …
70Valve audio amplifier - technical — Circuitry and performance Characteristics of valves Valves are very high input impedance (near infinite in most circuits) and high output impedance devices. They are also high voltage / low current devices.While valves themselves are described… …
