For Electricity we have terms and definitions in 7 topics. The topics are Dream, Energy, Explosives, Global History, Import Cars, Robotics and Solar Energy.

Electricity (Dream)

To dream of electricity, denotes there will be sudden changes about you, which will not afford you either advancement or pleasure. If you are shocked by it you will face a deplorable danger.
To see live electrical wire, foretells that enemies will disturb your plans, which have given you much anxiety in forming. To dream that you can send a package or yourself out over a wire with the same rapidity that a message can be sent, denotes you will finally overcome obstacles and be able to use your enemies' plans to advance yourself.

Electricity (Energy)

A property of the basic particles of matter. A form of energy having magnetic, radiant and chemical effects. Electric current is created by a flow of charged particles (electrons).

Electricity (Explosives)

Electricity describes a class of phenomena arising from the existence of charge. According to modern theory, most Elementary Particles of matter possess charge, either positive or negative. Two particles of like charge, both positive or both negative, repel each other; two particles of unlike charge are attracted ( Coulomb’s Law). The electric Force between two charged particles is much greater than the gravitational force between the particles. Many of the bulk properties of matter are ultimately due to the electric forces among the particles of which the substance is composed. Materials differ in their ability to allow charge to flow through them. Those that allow charge to pass easily are conductors ( Conduction), whereas those that allow extremely little charge to pass through are called insulators ( Insulation), or Dielectrics. A third class of materials, called Semiconductors, is intermediate. Electrostatics is the study of charges, or charged bodies, at rest. When a positive or negative charge builds up in fixed positions on objects, certain phenomena can be observed that are collectively referred to as static electricity. The charge can be built by rubbing certain objects together, such as silk and glass or rubber and fur; the friction between these objects causes Electrons to transfer from one to another with the result that the object losing electrons acquires a positive charge and the object gaining electrons acquires a negative charge. Electrodynamics is the study of charges in motion. A flow of electric charge constitutes an electric current. In order for a current to exist in a conductor, there must be an Electromotive Force (emf), or potential difference, between the conductor's ends. An electric Cell, a Photovoltaic Cell, and a Generator are all sources of emf. An emf source with an external conductor connected from one of the source's two terminals to the other constitutes an Electric Circuit. Direct current (DC) is a flow of current in one direction at a constant rate. Alternating current (AC) is a current flow that increases in magnitude from zero to a maximum, decreases back to zero, increases to a maximum in the opposite direction, decreases to zero, and then repeats this process periodically. The number of repetitions of the cycle occurring each second is defined as the frequency, which is expressed in Hertz (Hz). The frequency of ordinary household current in the U.S. is 60 cycles per sec (60 Hz), and electric devices must be designed to operate at this frequency. In a solid, the current consists not of a few electrons moving rapidly but of many electrons moving slowly; although this drift of electrons is slow, the impulse that causes it moves through the circuit, when the circuit is completed, at nearly the speed of light. The movement of electrons in a current is not steady; each electron moves in a series of stops and starts. In a direct current, the electrons are spread evenly through the conductor; in an alternating current, the electrons tend to congregate along the conductor surface. In liquids, gases, and semiconductors, current carriers may be positively or negatively charged.

Electricity (Global History)

A form of energy used in telegraphy from the 1840s on and for lighting, industrial motors, and railroads beginning in the 1880s. (p. 702)

Electricity (Import Cars)

Electricity is the movement of free electrons from one atom to another through a conductor.

Electricity (Robotics)

The flow of electrons through a circuit.

Electricity (Solar Energy)

Energy resulting from the flow of charge particles, such as electrons or ions.

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