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milady chapter 9
electricity and light therapy
| Question | Answer |
|---|---|
| what light rays produce heat, germicidal and chemical effects | ultraviolet rays |
| what light produces heat and is the most penetrating | red light |
| What light produces germicidal and chemical benefits | blue light |
| infrared rays are applied how far from the skin | Thirty inches |
| ultraviolet rays are applied how far from the skin | 30 to thirty six inches |
| What percentage of natural sunlight is invisible light rays | Sixty five percent |
| what percentage of natural sunlight is visible light | Thirty five percent |
| treatment by means of light rays is called what? | light therapy |
| Tesla current is commonly called the what kind of ray | violet ray |
| what high frequency current is commonly used in the barber shop | tesla current |
| there are four kinds of modalities available for use in electrotherapy services- tesla high frequency current, sinusoidal current, faradic current and : | galvanic current |
| what is the negative pole called | cathode |
| the positive pole is called the: | anode |
| the negative or positive pole of an electric current is indicated by its what | polarity |
| what is the applicator that directs electric current from the machine to the client's skin? | electrode |
| the different types of currents used in facial and scalp treatments are call: | modalities |
| all electrical appliances used in the barber shop should have what kind of certification | UL certified |
| what is the acronym for a device that senses imbalances within an electric circuit? | GFCI |
| what is the switch that automatically shuts off an electric circuit at the first indication of an overload | circuit breaker |
| a safety device that prevents excessive current from passing through a circuit is a: | fuse |
| what indicates how much electrical energy is used in one second? | a watt |
| what is the current used in facial and scalp treatments measured in? | milliamperes |
| a measure of electrical resistance is called an/a: | ohm |
| what does an ampere measure? | strength of an electric current |
| the unit that measures the pressure that pushes the flow of electrons through a conductor the: | volt |
| what kind of electrical current do battery operated items use | direct current DC |
| what kind of electric current do electric clippers and hair dryers use | alternating current AC |
| what changes alternating current to direct current called? (changes AC to DC) | rectifier |
| what changes DC current to AC current? (direct current to alternating current) | converter |
| An electrical current flowing first in one direction and then the other is called a/an: | alternating current |
| a constant electrical flowing only in one direction is called a/an: | direct current |
| an adjustable resistor that is used for controlling the current in a circuit is called a/an: | rheostat |
| Is copper wire a conductor or insulator | conductor |
| rubber or silk will act as what? an insulator or conductor | insulator |
| what is a substance that resists the passage of an electric current | insulator |
| what is a substance that readily transmits an electric current | conductor |
| what is the flow of electricity along a conductor | electric current |
| what does electricity produce | light, heat and energy |
Created by:
teresadl
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