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20 Cards in this Set
- Front
- Back
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ELECTRICITY |
A form of energy that produces light, heat, magnetic and chemical changes. |
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ELECTRIC CURRENT |
The movement of electricity along a path called a conductor. |
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LOAD |
The technical name for any electricity powered appliance. |
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CONDUCTOR |
A material that allows electricity to flow through it easily. |
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INSULATOR |
A material that does not allow the flow of electric current. |
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AMP |
A unit of electric strength. |
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VOLT |
A unit of electric pressure. |
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OHM |
A unit of electric resistance. |
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WATT |
A measue of how much electrical energy is being used. |
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ELECTROTHERAPY |
The application of electrical currents during treatments to the skin. |
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DIRECT CURRENT (DC) |
When electrons move at an even rate and flow in only 1 direction. |
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ALTERNATING CURRENT (AC) |
When electrons flow first in one direction and then the other. |
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UNDERWRITER'S LABORATORY (UL) |
Means the appliance has been certified to operate safely under the conditions the instructions specify. |
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HERTZ RATING |
Provides the number of cycles, per second, a generator alternates current from the source. One hertz unit indicates a frequency equal to one cycle per second. |
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SOURCE |
Provides the force to move the electrons in the conducting material. |
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BATTERY |
Has a positive terminal (+) and a negative (-) and produces direct current only. |
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GENERATOR |
A machine that uses mechanical energy to produce a flow of electrons. |
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FREQUENCY |
The number of times per second a generator's terminals mechanically alternate their charges, producing a current. |
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FUSE |
A device that contains a fine metal wire that allows current to flow through it. |
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CIRCUIT BREAKER |
Is simply a reusable device that breaks the flow of current when an overload occurs. |
