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SF ch. 4 electricity

A form of energy that produces light, heat, magnetic and chemical changes. Electricity
materials that best transport electricity to a load, i.e. copper, water Conductors
Materials that do not allow current to pass through them.i.e. silk, wood, plastic, rubber Insulator
unit of electric strength Amp
unit of electric pressure Volt
unit of electric resistance Ohm
measure of how much electricity is being used Watt
1,000 milliamperes is equal to 1 ampere
Electrons move at an even rate; flows in one direction. Direct current
Sources of electricity Batteries and Generator
More current flows than the line is designed to carry. Overload
this can occur when an extension cord with multiple plugs is used to attach 4 or 5 appliances to one wall socket. Fire
Reusable device that breaks the flow of current when an overload occurs. Circuit breaker
Passes through small part of the body Local shock
Passes through the nervous system General Shock
Application of special currents that have certain effects on the skin. Electrotherapy
negatively charged electrode. Cathode
positively charged electrode. Anode
Direct current- low volt and high amp Galvanic Current
Process of forcing an acid or alkali into the skin by applying current to the chemical Phoresis
Produces an alkaline reaction, which can force alkaline soluions to penetrate the skin. Anaphoresis
Introduces water-soluble products into the skin. Iontophoresis
alternating current, produces a mechanical effect, may preserve muscle tone. Faradic current
High frequency current "violet ray", alternating current, different voltages produce heat. Tesla Current
The slight seperation of the electrode from the skin creates a mild, ___________ sensation. Stimulating
Heat energy is transferred from a hotter body to a oooler body in _____ ways. Three
transfer of heat via direct contact. Conduction
transfer of heat via liquid or gas. Convection
transfer of heat through a vacuum. Radiation
White light is also known as Combination light
Visible light can be broken into its individual wavelengths by a________. Prism
The longest wavelengths of the visible spectrum are Red
Two kinds of light used in the salon are Flourescent and Incandescent
_______ percent of sunlight is composed of invisible rays beyond red, Infrared. eighty percent
The light must be placed _____ from the client's face. thirty inches
Ultraviolet rays are also known as _________. Actinic rays
Small doses of UV light can tan the skin and may help the body produce ________. Vitamin D
UV light is __________ and kill bacteria that causes skin infections. Germicidal
The client's _____ should be protected while receiving treatment using UV light therapy. Eyes
Created by: algray76