Chapter 13: Electricity Milady Cosmetology
Exam Questions With Verified Answers
Electricity - answer✔The movement of particles around an atom that creates pure energy.
Define: Electric Current - answer✔The flow of electricity along a conductor.
Conductor - answer✔Any material that conducts electricity. Meaning that electricity will pass threw the
material easily.
*Most metal are good conductors
*Copper is a good conductor
Nonconductor - answer✔Is a material does not transmit electricity. Meaning does not allow electricity
to flow threw it.
*Also referred to as an Insulator
Complete Electric Circuit - answer✔The path of negative and positive electric currents moving from the
generating source through the conductors and back to the generating source.
How fast does lightning travel? - answer✔Lightning can travel up to speeds of 60,000 miles per hour
threw the air.
What are the two types of electric currents? - answer✔1)Direct Current (DC)
2)Alternating Current (AC)
Direct Current - answer✔Is a constant even-flowing current that travels in one direction only and is
produced by chemical means.
Alternating Current - answer✔Is a rapid and interrupted current, flowing first in one direction then I the
opposite direction, it is produced by mechanical means and changes direction 60 times per seconds.
*Corded hair dryers, Curling irons, Table lamps
Converter - answer✔Is an apparatus that changes the direct current to alternating current.
Rectifier - answer✔Is an apparatus that changes the alternating current to direct current.
How fast is electricity? - answer✔Electricity is very fast: 186,000 miles per second. If you were to travel
that fast, you could go around the world eight times in the time it takes you to turn a light on.
Name some differences between direct and alternating current. - answer✔Direct Current:
*Constant, even-flowing, Travels in one direction, and produced by chemical means.
Alternating Current:
*Rapid and interrupted flow, Travels in two directions, and produced by mechanical means.
Volt - answer✔Is the unit that measures the pressure of force that pushes electric current forward
through a conductor.
*Also known as V or Voltage
Ampere - answer✔The measurement of the strength of a electric current.
*Also known as Amp
Milliampere - answer✔It 1/1,000 of a ampere. This is used towards facial and scalp treatments because
the ampere is to strong.
*Also known as mA
Omh - answer✔The measurement of the resistance of an electric current.
*Also known as O
Watt - answer✔The measurement of how much electricity is being used that second.
Kilowatt - answer✔Is 1,000 watts. In your house it is measured how many kilowatts per hour(kwh).
*Also known as K
Fuse - answer✔Prevents excessive current from passing through a circuit.
Circuit Breaker - answer✔A switch that automatically interrupts or shuts off an electrical current at the
first indication of an overload.
Grounding - answer✔Completes an electrical circuit and carries the current safely away.
What company tests all the electrical appliances? - answer✔Underwriters Laboratories (UL) certifies the
safety of electrical appliances. This certifies that they are safe when used according to manufactures
direction.
What is it called when electricity is use for skin treatments? - answer✔Electrotherapy is when electric
currents are used to treat the skin.
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