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Questions and Answers
All materials can be classified as conductors or nonconductors.
All materials can be classified as conductors or nonconductors.
True
A corded hair dryer runs on direct current.
A corded hair dryer runs on direct current.
False
The electricity in a house is measured in milliamperes per hour.
The electricity in a house is measured in milliamperes per hour.
False
A wire that is not large enough to carry the electrical current passing through it will overheat.
A wire that is not large enough to carry the electrical current passing through it will overheat.
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Appliances should be disconnected from the electrical outlet when not in use.
Appliances should be disconnected from the electrical outlet when not in use.
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When using galvanic current, the active electrode is used on the area to be treated.
When using galvanic current, the active electrode is used on the area to be treated.
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Microcurrent travels throughout the entire body.
Microcurrent travels throughout the entire body.
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The light found on each end of the visible spectrum of light is invisible to the naked eye.
The light found on each end of the visible spectrum of light is invisible to the naked eye.
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UVA light is most associated with sunburns.
UVA light is most associated with sunburns.
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Intense pulse light can only be used under the supervision of a physician.
Intense pulse light can only be used under the supervision of a physician.
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What should you do if you find a mess of electrical appliances plugged into two outlets?
What should you do if you find a mess of electrical appliances plugged into two outlets?
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Which of the following is not an insulator?
Which of the following is not an insulator?
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Which of the following items does not use direct current (DC)?
Which of the following items does not use direct current (DC)?
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Which of the following is a conductor?
Which of the following is a conductor?
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A safety device that switches off a circuit at the first indication of overload is called?
A safety device that switches off a circuit at the first indication of overload is called?
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Which of the following is not among the guidelines for using electrical appliances in the salon?
Which of the following is not among the guidelines for using electrical appliances in the salon?
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What are the three main types of modality?
What are the three main types of modality?
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What does Tesla refer to in this context?
What does Tesla refer to in this context?
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What is microcurrent?
What is microcurrent?
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What is galvanic current?
What is galvanic current?
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What are contraindications?
What are contraindications?
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What are electrodes?
What are electrodes?
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What is a cathode?
What is a cathode?
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What is an anode?
What is an anode?
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Study Notes
Electrical Concepts in Hair Care
- Materials can be classified as conductors (which conduct electricity) or nonconductors (which do not conduct electricity).
- Corded hair dryers operate on alternating current (AC), not direct current (DC).
- Household electricity usage is measured in kilowatts per hour, not milliamperes per hour.
Electrical Safety
- Insufficiently sized wires can overheat due to excess electrical current, activating safety devices like fuses or circuit breakers preventing fires.
- Disconnect appliances from outlets when not in use to avoid hazards; unplug by the plug, not the cord.
Electrical Treatments
- In galvanic current treatments, the active electrode is applied to the area needing treatment; the inactive electrode is used at the opposite pole.
- Microcurrent is localized and does not travel through the entire body; it only affects the treated area.
- Invisible light represents wavelengths at either end of the visible spectrum, undetectable by the naked eye.
UV Light Types
- UVB light, not UVA, is primarily associated with causing sunburn.
Medical Supervision
- Intense pulse light treatments must only be performed under a physician's supervision.
Salon Electrical Practices
- If electrical appliances are in unsafe condition, contact the responsible cosmetologist to address the situation.
- Water acts as a conductor, as ions allow it to conduct electricity.
Current Types
- Curling irons use alternating current (AC) instead of direct current (DC).
- Copper is recognized as a superior conductor of electricity, commonly used in wiring and motors.
Safety Devices
- A circuit breaker automatically interrupts the electrical circuit when an overload is detected.
Electrical Plug Guidelines
- Two-pronged plugs are safe and acceptable; three-pronged plugs offer additional safety but are not mandatory.
Modalities and Electrical Currents
- There are three main modalities that produce varied effects on the skin, enhancing treatment efficacy.
- Tesla current generates high-frequency, heat-producing effects using a single electrode.
- Microcurrent delivers a low-level current limited to local treatment areas.
- Galvanic current is characterized as direct current and induces chemical changes while remaining subdermal.
Additional Terms
- Contraindications indicate health or other reasons to avoid certain procedures on clients.
- Electrodes are devices directing electric currents to the skin, essential for various treatments.
- The cathode refers to the negative electrode, typically black, while the anode is the positive electrode, usually red.
Studying That Suits You
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Description
Test your knowledge with these flashcards covering key concepts from Chapter 13 of Hair School. Learn about conductors, nonconductors, and electrical currents relevant to hairdryers. Perfect for students preparing for their exams or for anyone looking to refresh their hairdressing knowledge.
