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44 Cards in this Set
- Front
- Back
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Electricity is not considered _____ because it does not occupy space, have physical properties, or have chemical properties. |
Matter |
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Electricity is a flow of _____. |
Electrons |
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A substance that easily transmits electricity is called a _____. |
Conductor |
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Which type of metal is commonly used in electric wiring and electric motors? |
Copper |
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Glass is considered to be a good _____. |
Insulator |
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Insulators are also known as _____. |
Nonconductors |
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The path of an electric current from the generating source through conductors and back to it's original source is called a _____. |
Complete circuit |
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Constant, even-flowing current that travels in one direction only is commonly known as _____. |
Direct current |
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How often does alternating current change direction? |
60 times per second |
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A cordless electric drill typically uses what kind of current? |
Direct |
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A desktop computer, ceiling fan, and a dishwasher all typically use what kind of current? |
Alternating |
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You would need a _____ to plug in a coffee pot into an automobile power outlet. |
Converter |
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A car battery is _____. |
12 volts |
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A normal wall socket is _____. |
121 volts |
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What is the unit that measures the strength of an electric current? |
AMP |
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The current for facial and scalp treatments is measured in _____. |
Milli(amp)ere |
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A hair dryer rated at 12 amps must have a cord that is _____ the thickness of a cord for one rated at 5 amps. |
Twice |
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Current will not flow through a conductor unless the _____. |
Volts are stronger than the OHM |
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A 60-wattb light bulb uses 60 watts of energy every _____. |
Second |
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The energy in your house is measured in _____. |
Kilowatts per hour |
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How many watts are in a kilowatt? |
1,000 watts |
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What does an ohm measure? |
Resistance in an electric current |
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What do catalysts use as an energy source? |
Heat & light |
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_____ is invisible, causes chemical reactions to happen more quickly, and has short wavelengths. |
Ultraviolet light (UV) |
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It is MOST important to protect UV curing products from _____. |
Light |
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_____ a circuit can result in fire, electric shock, and burns. |
Overloading |
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What does a fuse do when the circuit is overloaded? |
Melt or blow out |
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A _____ is a switch that automatically interrupts or shuts off an electric circuit at the first indication of overload. |
Circuit breaker |
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Modern electric circuits generally use _____. |
Circuit breakers |
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The _____ of electric files include a built-in circuit breaker. |
Electric plug |
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The _____ symbol on electrical appliances tells you that they have been certified as safe. |
UL |
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Which part of a plug supplies current to the circuit? |
The "live" connection |
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Which part of a plug completes the circuit and carries the current safely away? |
Ground connection |
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What purpose does the extra prong serve on a typical three-prong plug? |
Backup ground |
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It is recommended that you avoid contact with _____ when using electricity. |
Water & metal surfaces |
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It is recommended that you use how many plugs per outlet? |
One |
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It is recommended that you do NOT attempt to repair electrical appliances, step on or place objects on electrical cords, and/or allow electrical cords to become _____. |
Twisted |
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If a plug does not fit into an outlet, you should _____. |
Use a different outlet |
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Electricity is _____. |
Energy |
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The flow of electricity along a conductor is called _____. |
Electric current |
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The _____ in water make it a good conductor. |
Ions |
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The term _____ refers to a rapid and interrupted current, flowing first in one direction and then in the opposite direction. |
"alternating current" |
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A typical electric file uses what type of current? |
Alternating |
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Most air conditioners and clothes dryers run on _____. |
220 volts |
