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13 Cards in this Set
- Front
- Back
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Law of Electric Charges
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states that like charges repel or push away and opposite charges attract.
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Electric Force
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The force of attraction or repulsion on a charged particle that is due to an electric field.
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Electric Field
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The space around a charged object in which another charged object experiences an electric force.
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Conductor
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a material in which charges can move easily
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Insulator
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a material in which charges cannot move easily
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Static Electricity
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the electric charge at rest on an object; generally produced by friction or induction
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Electric Discharge
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The release of electricity stored in a source
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Electric Current
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the rate at which charges pass a given point.
It is measured in amperes (or amps) AC=The charges continually shift from flowing in one direction to flowing in the reverse direction. DC=The charges always flow in the same direction. |
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Voltage
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the potential difference between two points in a circuit. It is expressed in volts (V)
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Resistance
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the opposition to the flow of electric charge (by a material or device) – electrical friction.
Expressed in ohms (Ω) Conductors have low ___Insulators have high ___ |
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Cell
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devices that produce electrical energy by converting chemical or radiant energy into electrical energy.
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Thermocouple
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a device for measuring temperature in which a pair of wires of dissimilar metals (as copper and iron) are joined and the free ends of the wires are connected to an instrument (as a voltmeter) that measures the difference in potential created at the junction of the two metals
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Photocell
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a device that generates an electric current or voltage dependent on the degree of illumination.
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