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| Electromotive force
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The amount of energy derived from an electrical source per unit quantity of electricity passing through the source. |
| Electron
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An elementary particle of an atom with a negative electrical charge and a mass of 1/1837 of a proton; electrons surround the positively charged nucleus of an atom and determine the chemical properties of an atom. |
| Electron beam gun
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Device that produces and accelerates electrons to use in welding and cutting operations. |
| Electron volt
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The amount of kinetic energy gained by an electron when accelerated through an electric potential difference of 1 Volt; equivalent to 1.603 x 10^-19; a unit of energy or work; abbreviated as eV. |
| Electronic ballast
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A device that uses electronic components to regulate the voltage of fluorescent lamps. |
| Electronic feedback control
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Electronic feedback control (also called electronic analog feedback or electronic control) is a circuit on some electronic drills which senses the need for power and provides it, maintaining a constant desired speed under loaded conditions. |
| Electronic measuring device
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With electronic measuring devices, sound waves are used to accurately measure distance and compute dimensions faster than using traditional measuring and calculating tools. Common features include the ability to add and multiply distances and compute square and cubic feet. |
| Electronic stud finder
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Ultrasonic or magnetic mechanism used to locate studs behind a wall by sensing the presence of a nail head or the increase in density at the site of the stud and beeps or lights at the discovery. |
| Electronic transfer
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Transfer of mortgage or other payment automatically by deduction from a checking or savings account. |
| Electroslag welding (esw)
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Electric arc initially melts the slag and then the slag is kept molten by an electric current. This process provides heat for welding and an inert shield, which protects the weld from oxygen in the air. |
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