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25 Cards in this Set
- Front
- Back
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Voltage
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An electromotive force or potential difference expressed in volts. Gives energy to charge.
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Current
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A flow of electricity (charge) through a conductor.
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Resistance
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The ability of a devise to opposes the flow of current, causing energy loss.
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Power
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The rate at which energy is used.
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Ohms
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The units of measuring resistance.
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Joules
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The units of measuring energy.
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Ampere
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The units of measuring current.
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Watt
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The units of measuring power, derived from joules per second.
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Charge
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A property of matter that is responsible for electricity, existing as a positive or negative charge.
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Positively charged
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Has lost electrons and now has more protons (positives) than electrons (negatives)
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Negatively charged
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Has gained electrons and now has more electrons (negatives) than protons (positives).
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Coulomb
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Units of measuring charge.
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Static
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Not moving. No current or flow of electrons.
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Electrons
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A subatomic particle found in shells around the nucleus of an atom.
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Conductor
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A substance that allows the flow of electrons (current).
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Insulator
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A substance that does not allow the flow of electrons.
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Circuit
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A system of electrical components that forms a loop and carries current.
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Components
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Parts in a circuit. Power supply, resistors, bulbs etc...
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Series
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A circuit with a single pathway. Single loop.
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Parallel
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A circuit with branched pathways. multiple loops off a power supply.
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Ammeter
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A devise to measure the flow of current in amperes.
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Voltmeter
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A devise to measure the voltage change across a electrical component.
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Fuse
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A component in a circuit that cuts out and stops the current if it gets to high.
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Rheostat
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A component that has variable resistance.
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Bulb
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A component that uses electrical energy to produce light and heat.
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