Questions and Answers
The movement of electrons from one atom to another along a conductor is called __________.
electricity
Electric wires can be covered with a material that does not transmit electricity, such as rubber or plastic coating. This material is known as a(n) __________.
insulator
An apparatus that changes direct current to alternating current is a(n) __________.
inverter
The term __________ current refers to a rapid and interrupted current, flowing first in one direction and then in the opposite direction.
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The unit that measures the pressure or force that pushes the electric current forward through a conductor is a(n) __________.
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Which unit measures the resistance of an electric current?
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The device that prevents excessive current from passing through a circuit is called a(n) __________.
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A switch that automatically interrupts or shuts off an electric current at the first indication of an overload is a(n) ________.
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The negative electrode of an electrotherapy device is called a(n) __________.
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Grounding completes a(n) _________ and carries the current safely away.
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All of the electrical appliances you use should __________.
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When using ___________ current, the active electrode is the electrode used on the area to be treated.
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Microcurrent can be used to ___________ and restore elasticity.
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A wavelength is the distance between successive peaks of ___________ waves.
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Invisible light is the light at either end of the __________ that is invisible to the naked eye.
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Ultraviolet A (UVA) light is often used in tanning beds.
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Catalysts are substances that speed up _________ reactions.
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Constant and direct current that has a positive and negative pole and produces chemical changes when it passes through the tissues and fluids of the body is known as __________ current.
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A ___________ is an extremely low level of electricity that mirrors the body's natural electrical impulses.
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The thermal or heat-producing current with a high rate of oscillation or vibration that is commonly used for scalp and facial treatments is called __________ current.
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For safety, use no more than _________ plug(s) in each outlet.
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The application of UV light must be done with the utmost care in a proper manner by a qualified professional because overexposure can lead to skin __________.
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The unit that measures how much electric energy is being used in one second is a(n) __________.
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Electric ___________ refers to the flow of electricity along a conductor.
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Which is considered a good conductor?
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Study Notes
Electricity Fundamentals
- Electricity is the movement of electrons between atoms along a conductor.
- Electric wires are typically insulated with materials like rubber or plastic to prevent electricity transmission, known as insulators.
Electrical Devices and Current Types
- An inverter converts direct current (DC) to alternating current (AC).
- Alternating current (AC) is characterized by a rapid and interrupted flow, changing direction periodically.
Units of Measurement
- Volt measures the pressure that pushes electric current through a conductor.
- Resistance of electric current is measured in ohms.
- Watt quantifies the amount of electric energy used per second.
Circuit Protection
- A fuse protects circuits by preventing excessive current flow.
- Circuit breakers automatically interrupt electric current in response to overloads.
Electrotherapy
- The negative electrode in electrotherapy devices is termed the cathode.
- Grounding completes an electric circuit, ensuring safe current dissipation.
Appliance Safety
- All electrical appliances should be certified by Underwriters Laboratories (UL) for safety.
Therapeutic Current Types
- Galvanic current is used in treatments, with the active electrode applied to the targeted area.
- Microcurrent helps increase muscle tone and restore elasticity.
- Tesla high-frequency current generates thermal energy and is used for scalp and facial treatments.
Light and Wave Properties
- A wavelength measures the distance between peaks of electromagnetic waves.
- Invisible light lies at either end of the visible light spectrum, undetectable by the naked eye.
- Ultraviolet A (UVA) light is commonly utilized in tanning beds.
Chemical Reactions and Conductivity
- Catalysts accelerate chemical reactions.
- Galvanic current induces chemical changes in body tissues and fluids.
- Microcurrent, an extremely low-level electricity, mimics the body’s natural electrical impulses.
Electrical Safety Tips
- Only use one plug per outlet for safety.
- Overexposure to UV light can result in skin damage and increase cancer risk.
Conductivity
- Tap water is recognized as a good conductor of electricity, allowing efficient current flow.
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Description
Test your knowledge on electricity and electrical safety with this quiz based on Chapter 7 of the Foundations curriculum. Explore key concepts such as conductors, insulators, and the basics of current types. Perfect for reinforcing important terminology and definitions.
