Questions and Answers
Light, heat, chemical and magnetic changes are all produced by:
Material that best transports electricity is a(n):
Since silver and copper transmit electricity, they are called:
Materials that do not allow a current to pass through them are called:
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Material such as glass, rubber or paper around a conductor that does not allow current to pass through it is called a(n):
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Which of the following materials does not allow a current to pass through it?
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An ampere is a unit of electric:
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How many milliamperes equal one ampere?
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A volt is a unit of electric:
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A unit of electrical resistance is called a(n):
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A measure of how much electric energy is being used is known as a:
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A constant electric current flowing in one direction is called a(n):
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Which of the following devices breaks the flow of current when an overload occurs?
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Which of the following steps should not be followed to break the circuit when a person comes in contact with an electric current?
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The application of special currents (or modalities) that have a variety of effects on the skin is called:
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When performing an Electrotherapy procedure, what apparatus or current conductor is used to bring the current from the appliance to the client's skin?
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The direct current used in Electrotherapy treatments is:
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The electrode that is negatively charged during an Electrotherapy treatment is known as a(n):
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What temporary effect will a negative electrode pole produce when applying galvanic current during an Electrotherapy treatment?
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Which of the following is not a temporary effect of the positive pole of galvanic current?
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Which Electrotherapy treatment can cause sebum to be broken down or blackheads to be liquefied, as in deep-pore cleaning?
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When using galvanic current on clients in a salon, what precaution must a cosmetologist take in order to prevent injury to the client?
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Faradic current is used chiefly to cause:
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Study Notes
Fundamentals of Electricity
- Light, heat, chemical, and magnetic changes are all effects produced by electricity.
- Electricity is best transported through conductors, which are materials like silver and copper.
- Materials that prevent current flow are known as insulators (e.g., glass, rubber, paper).
- Alcohol is an example of a material that does not permit current to pass through.
Electric Current and Measurement
- An ampere measures electric strength; one ampere equals 1,000 milliamperes.
- A volt represents electric pressure, while ohm is the unit for electrical resistance.
- Watts measure the amount of electric energy being used.
Types of Electric Currents
- Direct current (DC) is a constant flow of electricity in one direction, used in many devices.
- Alternating current (AC) changes direction periodically, most commonly utilized in household power supply.
Circuit Safety Devices
- Circuit breakers and fuses are critical components that stop current flow when there’s an overload.
- Proper steps must be followed in emergencies, such as unplugging devices or using insulators, without touching a person in contact with live circuits.
Electrotherapy
- Electrotherapy applies specific electrical currents for various skin effects.
- Electrodes serve as conductors for delivering the treatment to the skin.
- Galvanic current is a direct current used in Electrotherapy, with the negatively charged electrode referred to as the cathode.
Effects of Electrotherapy
- The negative electrode in galvanic treatments can induce increased blood flow.
- Positive electrode effects may include soothing nerves and producing acidic reactions but not softening tissues.
- Desincrustation is an Electrotherapy method that breaks down sebum and cleanses pores.
Precautions in Electrotherapy
- Avoid using galvanic current over areas with broken capillaries to prevent injury.
- Faradic current is specifically used for inducing muscle contractions, making it significant in therapeutic applications.
Studying That Suits You
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Description
Test your knowledge of electricity with these flashcards from Chapter 4. Each card presents a question about key concepts such as conductors, insulators, and the nature of electricity itself. Perfect for quick revision or study sessions.
