40 terms

ELECTRICITY Chapter 4

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Light, heat, chemical & magnetic changes are all produced by
electricity
Material that best transports electricity is a
conductor
Since silver & copper transmit electricity, they are called
insulators
Materials that do not allow a current to pass through them are called
insulators
Materials such as glass, rubber or paper around a conductor that does not allow current to pass through it is called a
insulators
Which of the following materials does NOT allow a current to pass through it?
alcohol
An ampere is a unit of electric
stength
How many milliampere equal one ampere?
1,000
A volt is a unit of electric
pressure
a unit of electric resistance is called a
ohm
A measure of how much electric energy is being used is known as a
watt
A constant electric current flowing in one direction is called a
direct current
Which of the following devices breaks the flow of current when an overload occurs?
circuit breaker
Which of the following steps should NOT be followed to break the circuit when person comes in contact with an electric current?
touch the person to ground the circuit
The application of special currents (or modalities ) that have a variety of effects on the skin is called
electrotherapy
A current conductor used to direct the current from the appliance to the client`s skin is called a
electrode
The direct current used in electrotherapy treadments is
galvanic
The electrode that is negatively charged during an electrotherapy treadment is known as a
cathode
What temporary effect will a negative electrode pole produce when applying galvanic current during an electrotherapy treadment?
increase in blood flow
Which of the following is NOT a temporary effect of the positive pole of galvanic current?
softens tissues
A treatment in which sebum is broken down or blackheads are liquefied as in deep-pore cleansing, is known as
desincrustation
When using galvanic current on clients in a salon, what precaution must a salon professional take in order to prevent injury to the client?
do not use over an area having broken capillaries
Faradic current is used chiefly to cause
muscle contractions
Tesla, a high frequency current, is known as the
violet-ray
High frequency & alternating current are charactertics of which type of electrotherapy?
Tesla
An alternating current that can be adjusted to different voltages to produce heat is
high frequency
If the client is holding the active electrode while the salon profressional manually stimulates the area being treated, what method of tesla current is being used?
indirect application
Which of the following will produce a mild, stimulating sensation while using high frequency current?
slightly separating the electrode from the skin
Treatment with light rays is called
light therapy
Which type of light can be broken into its individual wavelengths
white light
Which of the following has the longest wavelengths?
infraed rays
A salon owner wants to mimic nattural sunlight as closely as possible in the salon reception area. Which type of light would most likely be used to accomplish this requirement?
incandescent
Pure heat rays are produced by
infared rays
Which of the following is a benefit of using infared light during a facial?
increases circulation
The minimum distancean an infared lamp must be placed from the client`s face during a facial is about
30"
Which of the following are also known as actinic rays?
ultraviolet
Which of the following is a benefit derived from UV light?
small doses tan the skin
Small does of ultraviolet light may help the body produce
Vitamin D
Bacteria that cause skin infections can be killed by
ultraviolet light
Before using ultraviolet light on a client, the skin or scalp should be
cleansed