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