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ch-4 electricity
| Question | Answer |
|---|---|
| electricity | is a form of energy that produces light,heat,magnetic and checmical changes |
| electric current | is the movement of electricity along a path called a conductor |
| load | is the technical name for any electrically powered appliance |
| conductor | is a material that allows electricity to flow through it easily |
| insulator | is a material that does not allow the flow of electric |
| amp | is a unit of electric strength |
| ohm | is a unit of electric resistance |
| watt | is a measure of how much electrical energy is being used |
| electrotherapy | is the application of electrical current during treatments to the skin |
| one ampere equals | 1,000 milliamperes |
| volt | is a unit of electric pressure |
| one kilowatt | equals 1,000 watts |
| direct current | dc in which electrons move at an even rate and flow in only one direction |
| alternating current | ac in which electrons flow first in one direction and then in the other |
| converter | changes direct current to alternating current |
| rectifier | changes alternating current to direct current |
| circuit | a flow of electrons along a path called an conductor |
| open circuit | when you turn the switch off, the circuit breaks and is now an open circuit |
| overload | passage of more current than an electrical line can carry which can cause an overload |
| short circuit | occurs when a foreign conductor comes in contact with a wire carrying current to the load |
| fuse | device that contains a fine metal wire that allows current to flow |
| circuit breaker | reusable device that breaks the flow of current when an over load occurs |
| grounding wire | another safety device is called a three-wire system any appliance requiring this protection has a three-prong plug |
| shock | human contact with an electric current causes a shock |
| local shock | passes through a small part of the body, causing burns and muscle contractions |
| general shock | passes through the nervous system |
| electrotherapy | is the application of special currents (or modalities) that have certain effects on the skin |
| galvanic current | has a chemical effects that are caused by passing the current through particular acid or alkaline solutions and or by passing the current through body tissues and fluids |
| phoresis | the process of forcing an acid (+) or alkali (-) into the skin by applying current to the chemical is sometimes referred to as "bleaching the skin" phoresis |
| anaphorsis | the negative pole of galvanic current is believed to have the following temporary effects on the area of the body to which it is applied |
| cataphoresis | the positive pole of galvanic current is believed to have temporary effects opposite of those produced by the negative pole |
| galvanic current electrotherapy | the active electrode is connected to either the positive or negative pole depending on the therapeautic reaction desired |
| iontophoresis | introduces water-soluble treatment products into the skin |
| alert | do not use the galvanic current over an area that has many broken capillaries |
| faradic current | is an alternating current(ac) interrupted to produce a mechanical nonchemical reaction stimulates nerves and muscles |
| sinusoidal current | is an alternating current (ac)with a mechanical effect much like the faradic current that produces muscle contractions |
| alert sinusoidal current | electrotherapy should not be used on unhealthy and/or broken skin |
| tesla current | high frequency current known as the "violet-ray" is an alternating current |
| light therapy | is the production of beneficial effects on the body through treatments using light rays or waves |
| visible light | the portion of the electromagnetic spectrum humans can see is called visible light. this range of wavelenghts produces visible color |
| white light | is referred to as combination light. this visible light can be broken into its individual wavelengths by a prism. a prism is a three sided glass object |
| wavelengths | that produce red are the longest waves of the visible spectrum |
| fluorescent light | is an economical and long-lasting light source.fluorescent light can create "blue" tones or cool casts in the objects it lights |
| invisible light | eighty percent of sunlight is composed of invisible rays beyond red,which are called infrared |
| incandescent | incandescent light creates the closest substitute for natural sunlight |
| infrared light | infrared rays produce pure heat rays, any infrared light produces heat |
| ultraviolet light | ultraviolet rays also known as actinic rays have a shorter wavelength and can be more damaging than infrared rays. uv rays both produce both positive and negative effects on the skin |
| UV-ALERT | when using ultraviolet rays you and your client should wear protective eyewear |
Created by:
arlenebermudez
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