Principles of Electricty 1
Electric current moves along a path called a?
Conductor
When a blow dryer is on and air begins to flow you have an example of what?
closed circuit
treatment with light rays or waves is called?
light therapy
white light is referred to as?
combination light
using either uv or infrared light to treat the skin is called?
light therapy
Light, heat chemical and magnetic changes are all produced by?
electricity
What device breaks the flow of current when an overload occurs?
circuit breaker
Electric current in a conductor causes heat by?
increasing resistance in a line?
decreasing resistance in a line?
LED devices use blue light to help?
reduce acne
a salon owner wants to balance the tones of light in the salon? which type of light would likely be incorporated?
incandescent
Materials that best transport electricity?
conductor
A volt is a unit of electric?
pressure
Application of specific current or piece of equipment for corrective and therapeutic benefits on the skin is?
electrotherapy
the portion of the electromagnetic spectrum humans can see is known as?
visible light
over half of sunlight is composed of invisible rays beyond red, which are called?
infrared
Glass, rubber or paper are examples of what type of materials?
insulating materials
If an appliance has been certified to operate safely under the conditions specified then it has what designation?
UL underwriters laboratory
what type of outlet is recommended in any area where water and electricity could come into contact?
GFCI
DOUBLE points if you tell me what it stands for.
which type of light can be broken into individual wavelengths by a prism?
white
minimum distance an infrared lamp should be placed during a facial?
30"
An amp is a unit of electric?
Strength
Two forms of electric current are?
AC
DC
the direct current used in electrotherapy treatments is called?
galvanic
depending on its design, which type of light can create blue or cool tones?
fluorescent
small doses of UV light help the body produce?
Vitamin D