Electric Current
The two forms of electric current are
what is, Direct Current (DC) and Alternating Current (AC)
Constant amplitude over pulse duration
what is rectangular (pulse wave)
The form of energy that produces light, heat, and magnetic and chemical changes.
what is, electricity
Thermal breakdown of the skin; evident when a blister forms on burned skin.
what is pyrolysis
Combination light (also called...)
what is white light
The negative and positive poles at the ends of a circuit.
what is polarity
Periodic waveform that instantly transitions between two levels of rise and fall times at a steady frequency
what is square
The unit of electrical pressure
What is volt
Transfer of heat via direct contact
what is conduction
Responsible for DNA damage and skin damage in the form of sunburn
what is UV
The visual representation of the output current that varies in time strength and direction
what is waveform
Linear wave motion with periodic rise and fall times in a motion that is up-and-down or side-to-side
what is sinusoidal (smooth wave)
The two common sources of electric current
what are batteries and generators
Two types of current used in esthetics electrotherapy
what is direct current (DC) and alternating current (AC)
These four things contribute to UV exposure and should be considered when designing a home care plan.
what is
1. altitude
2. latitude
3. time of year
4. time of day
Installed in areas where electricity and water could come in contact. Interrupts power if there is contact with water, preventing electric shock.
what is GFCI (Ground Fault Circuit Interrupter)
Periodic waveform in which the rinse time and fall time are different
what is saw-toothed
The ______ adjusts the flow of current that can change volume or intensity of voltage
what is rheostat
Esthetic electrotherapy devices improve the skin's appearance by: (3 answers)
what is
1. stimulation
2. product application enhancement
3. deep cleansing
Prolonged heating of tissues with light to cause ablation (removal or death of the tissue)
what is photothermal
The nameplate of an appliance tells: (3 answers)
what is
1. Frequency (Hz) needed
2. Volts needed (120V or 240V)
3. Watts appliance consumes per second (100W, 200W, etc.)
periodic linear waveform that has rise and fall times that are equal
what is triangular
The ______ _______ listing means the appliance has been certified to operate safely under the conditions specified by the instructions
Electrotherapy currents: interrupted DC, visibly stimulates muscles. Used in electrical muscle stimulation devices (EMS)
what is Faradic
the three primary sources of white light in the spa.
what is fluorescent, incandescent, and LED