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1. a form of semiconductor diode in which at a critical reverse voltage a large reverse current can flow.

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Watt's Law states that: Power (in Watts) = Voltage (in Volts) x Current (in Amps) P = V I Combining with Ohm's law we get two other useful forms: P = V*V / R and P = I*I*R Power is a measurement of the amount of work that can be done with the circuit, such as turning a motor or lighiting a light bulb.

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the SI unit of power, equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere.

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A multimeter or a multitester, also known as a VOM (volt-ohm-milliammeter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter can measure voltage, current, and resistance. Analog multimeters use a microammeter with a moving pointer to display readings.

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A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter.

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an electromotive force or potential difference expressed in volts.

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the SI unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.

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A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.

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The valence shell is the outermost shell of an atom in its uncombined state, which contains the electrons most likely to account for the nature of any reactions involving the atom and of the bonding interactions it has with other atoms.

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solve serious problems for a company or other organization.

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a semiconductor device with three connections, capable of amplification in addition to rectification.

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a device for making and breaking the connection in an electric circuit

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a stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair.

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solderless breadboard A breadboard is a construction base for prototyping of electronics. ... In the 1970s the solderless breadboard ( a.k.a. plugboard, a terminal array board) became available and nowadays the term "breadboard" is commonly used to refer to these. Because the solderless breadboard does not require soldering, it is reusable.

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solderless breadboard A breadboard is a construction base for prototyping of electronics. ... In the 1970s the solderless breadboard ( a.k.a. plugboard, a terminal array board) became available and nowadays the term "breadboard" is commonly used to refer to these. Because the solderless breadboard does not require soldering, it is reusable.

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SolarWall is the brand name of a transpired collector designed and manufactured by the Toronto, Canada based company Conserval Engineering.

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A combination circuit is one that has a "combination" of series and parallel paths for the electricity to flow. Its properties are a combination of the two.

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A series circuit is a circuit in which resistors are arranged in a chain, so the current has only one path to take. The current is the same through each resistor.

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a device which detects or measures a physical property and records, indicates, or otherwise responds to it.

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a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.

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A rechargeable battery, storage battery, secondary cell, or accumulator is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use.

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schematic symbol An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit.

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schematic symbol An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit.

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a representation of the elements of a system using abstract, graphic symbols rather than realistic pictures.

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a device having a designed resistance to the passage of an electric current.

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the refusal to accept or comply with something; the attempt to prevent something by action or argument.

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a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

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an electric cell that produces current by an irreversible chemical reaction.

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the ability to do something or act in a particular way, especially as a faculty or quality.

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the property of having poles or being polar.

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A parallel circuit has two or more paths for current to flow through. Voltage is the same across each component of the parallel circuit. The sum of the currents through each path is equal to the total current that flows from the source

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a laboratory instrument commonly used to display and analyze the waveform of electronic signals.

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the current through a conductor between two points is directly proportional to the voltage across the two points.

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An ohmmeter is an electrical instrument that measures electrical resistance, the opposition to an electric current. Micro-ohmmeters make low resistance measurements. Megohmmeters measure large values of resistance. The unit of measurement for resistance is ohms.

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a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

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1.

a machine, especially one powered by electricity or internal combustion, that supplies motive power for a vehicle or for some other device with moving parts.

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a device for giving light, either one consisting of an electric bulb together with its holder and shade or cover, or one burning gas or a liquid fuel and consisting of a wick or mantle and a glass shade.

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A light-emitting diode is a semiconductor light source that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. This effect is called electroluminescence.

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the total energy of an isolated system remains constant; it is said to be conserved over time.

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an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

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In electricity generation, a generator is a device that converts motive power into electrical power for use in an external circuit. Sources of mechanical energy include steam turbines, gas turbines, water turbines, internal combustion engines and even hand cranks.\

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Gas discharge lamps are a family of artificial light sources (or lamps). These lamps produce light by sending electricity through an ionized gas.

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is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescenceto produce visible light.

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a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

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a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.

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Electrical engineering is one of the newer branches of engineering, and dates back to the late 19th century. It is the branch of engineering that deals with the technology of electricity

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an electric current flowing in one direction only.

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a semiconductor device with two terminals, typically allowing the flow of current in one direction only.

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is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas

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the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere.

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A digital multimeter's Continuity Test mode can be used to test switches, fuses, electrical connections, conductors and other components.

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a person in charge of a train, streetcar, or other public conveyance, who collects fares and sells tickets.

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also called compact fluorescent light, energy-saving light, and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent light bulb

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A printed circuit board mechanically supports and electrically connects electronic components or electrical components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductive substrate

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Cell is a peer-reviewed scientific journal publishing research papers across a broad range of disciplines within the life science

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passive two-terminal electronic component that stores electrical energy in an electric field. The effect of a capacitor is known as capacitance.

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An electric battery is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights,

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An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.

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an instrument for measuring electric current in amperes.

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also known as the Brown & Sharpe wire gauge, is a logarithmic stepped standardized wire gauge system used since 1857, predominantly in North America, for the diameters of round, solid, nonferrous, electrically conducting wire. Dimensions of the wires are given in ASTM standard B 258.

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an electric current that reverses its direction many times a second at regular intervals, typically used in power supplies