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39 Cards in this Set
- Front
- Back
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Alternating current
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An electric current that regularly changes the direction of its flow.
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Ampere (A or amp)
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The unit used to measure the amount of current that flows past a point in one second.
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Capacitors
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An object or device that stores an electric charge.
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Circuit
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A circular conducting path
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Circuit breaker
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A safety device that switches to break a circuit if current becomes too high.
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Coulomb (C)
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The unit of electrical charge.
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Current
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The flow of charges.
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Current electricity
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The effects produced by moving charges.
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Direct current
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An electric current that flows in only one direction.
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Electrical conductor
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Any material that offers little resistance to the flow of an electric current. Materials that are good ********** have a large number of free electrons (electrons not tightly bound to atoms) available to carry the current.
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Electrical energy
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Energy that is associated with the flow of charged particles through a conductor.
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Electrical insulator
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A material in which electrons stick with their atoms. Because the electrons don't move, these materials are poor conductors of electricity.
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Electric charge
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A charge is a measure of the electrical energy, positive or negative, held by an object.
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Electric current
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A movement or flow of electrically charged particles, typically measured in amperes.
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Electricity
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A general term for the variety of phenomena resulting from the presence and flow of electric charges. The movement of charged particles.
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Electric potential
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The capacity of an electric field to do work, typically measured in volts.
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Electric power
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The rate at which electric energy is converted to or from another energy form, such as light, heat, or mechanical energy.
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Electroscope
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A device that detects electric charges.
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Electrostatics
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The study of electricity where the charges are not flowing.
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Fuses
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A safety device that melts to break a circuit if the current becomes too high.
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Induction
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Charging an object by shifting the paths of its electrons.
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Kilowatt (kW)
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1000 watts.
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Law of charges
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Like charges repel; unlike charges attract.
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Load
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The resistive devices in an electrical current.
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Ohm
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The unit used to measure resistance.
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Ohm's law
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Voltage equals the current multiplied by the resistance.
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Parallel circuit
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A circuit with two or more paths for the electrons in it to follow.
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Resistance
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(electrical) Opposition to the flow of electrons.
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Resistor
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An object that resists the flow of electricity
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Semiconductors
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A substance that holds its electrons in a way that allows a partial flow of electricity.
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Series circuit
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A circuit with a sinlw path for all the electrons in it to follow.
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Short circuit
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A situation in which an electrical current passes through a path shorter than the entire circuit.
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Static electricity
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The effects produced by stationary charges.
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Switch
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A device that can be used to break (open or close) a circuit.
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Triboelectricity
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An electrical charge produced by friction between two objects.
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Triboelectric series
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Common materials are ranked according to how well they create static electricity when rubbed with another material,as well as what charge the material will possess.
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Voltage
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The amount of push needed to cause electrons to move between two points.
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Volt (V)
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The unit used to measure the difference between electrical potentials.
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Watt (W)
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The SI unit of power; 1 joule of energy per second.
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