F7 (Electricity & Electrical Safety) Flashcards
An insulator or ___________ is a substance that does not easily transmit electricity.
nonconductor
What electrical term is abbreviated AC?
alternating current
What apparatus changes alternate current to direct current?
rectifier
The term used for measuring the strength of an electric current.
ampere
What unit of measure is equivalent to 1/1000 of an ampere?
milliampere
The term used for measuring the resistance of an electrical current is
ohm
The term used for measuring how much electrical energy is being used in one second ___________.
watt
Which safety devices prevent the overheating of electric wires?
fuses and circuit breakers
Which apparatus conducts electric current from an electrotherapy device to the client’s skin?
electrode
A positive electrode is called an
anode
Commonly used modalities in beauty and wellness are Tesla HFC, micro current, and _____________.
galvanic current
The process of introducing water-soluble products into the skin with the use of electric current is known as
iontophoresis
The current used in facial and scalp treatments is measured in
millamperes
All electrical appliances used in the salon, spa, or barbershop should be ________ certified
UL
An extremely low level of electricity that mirrors the body’s natural electricity impulses is known as
microcurrent
Treatment by means of light rays is called light
therapy
The different types of currents used in facial and scalp treatments are called
modalities
the distance between two successive peaks of electromagnetic waves is called
wavelength
Thirty five percent of natural sunlight is made up of
visible light
UV rays, known as cold light, make up ______ percent of natural light.
5
The type of light blocked by the ozone layer is
UVC
UVB is often called the burning light because it is most associated with
sunburns
____________ are substances that speed up chemical reactions
Catalysts
A GFI protects from electrical shock by _____________ a circuit when there is a leak.
interrupting
