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The ability to do work.

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Substances or devices that readily conduct electricity.

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

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Like charges repel, opposite charges attract, and charged objects attract neutrally charged objects.

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Substance or devices that does not readily conduct electricity.

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Substances or devices that conduct electricity better than a insulator, but worse than a conductor.

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A substance capable of becoming superconducting at sufficiently low temperatures.

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The release and transmission of electricity.

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A path in which electrons from a voltage or current source flow.

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Causes electrons to flow in a circuit.

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A material where electrons can move freely in a circuit.

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An electrical component or portion of a circuit that consumes electric power.

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A switch that turns the flow of electrons on/off in a circuit.

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The time rate of flow of electric charge. The symbol is current intensity (I) and the unit is amperes (A).

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An instrument for measuring electric current in amperes.

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An electromotive force or potential difference. The symbol is voltage (V) and the unit is volts (V).

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An instrument for measuring electric potential in volts.

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A measure of how much a component decreases the current. The symbol is resistance (R) and the unit is ohms (Ω).

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Electric current is directly proportional to voltage and inversely proportional to resistance.

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An electronic component that is used to vary the amount of current that flows through a circuit.

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A closed circuit in which the current follows one path.

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A closed circuit in which the current divides into two or more paths.

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Converting electrical energy into thermal energy. An example would be a toaster.

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Converting thermal energy into electrical energy. An example would be a thermocouple.

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Converting electrical energy into mechanical energy. An example would be an electric motor.

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Converting mechanical energy into electrical energy. An example would be an electric generator.

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Converting electrical energy into light energy. An example would be an incandescent light bulb.

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Converting light energy into electrical energy. An example would be a solar cell.

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A device that generates a potential difference between electrodes using chemical reactions.

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A liquid or gel that contains ions and can be decomposed by electrolysis.

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Conductors through which electricity enters or leaves an object, substance, or region.

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The positively charged electrode.

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The negatively charged electrode.

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An type of electrical battery which cannot be recharged.

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A type of electrical battery which can be recharged.

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A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.

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Transform mechanical energy into electrical energy.

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Transform electrical energy into mechanical energy.

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An attachment, connected to the armature of a motor or generator, through which electrical connection is made and which ensures that the current flows as direct current.

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A device which conducts current between stationary wires and moving parts.

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A magnet that retains its magnetic properties in the absence of an inducing field or current.

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The rotating coil or coils of a dynamo or electric motor.

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An apparatus for reducing or increasing the voltage of an alternating current.

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An automatic device for stopping the flow of current in an electric circuit as a safety measure.

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A safety device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level.

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

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The rate of doing work. The symbol is power (P) and the unit is watt (W).

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Can exist in a variety of forms, such as electrical, mechanical, chemical, thermal, or nuclear, and can be transformed from one form to another. The symbol is energy (E) and the unit is joule (J).

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Using less energy to provide the same service. The symbol is efficiency (e) and the unit is percent (%).

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Energy from a source that is not depleted when used.

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An energy source that will eventually run out.

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Energy that a body possesses by virtue of being in motion.

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Energy used to move charged particles through a wire from a power plant to homes and businesses.

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A plant that produces electricity by using water to propel the turbines.

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A power plant in which the heat source is a nuclear reactor.

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An area of land with a group of energy-producing windmills or wind turbines.

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A power plant based on the use of geothermal energy to generate electricity.

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A power plant based on the conversion of energy obtained from tides into electricity.

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A power plant based on the conversion of sunlight into electricity.

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The harmful release of heated liquid into a body of water or heat released into the air as a waste product of a business.

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A gas that contributes to the greenhouse effect by absorbing infrared radiation.