Untitled Quiz

Questions and Answers

Define electric current.

Electric current is the flow of electricity along a conductor.

Explain the difference between a conductor and a nonconductor.

The difference is the ability of the material to transmit electricity.

Describe the two types of electric current and give examples of each.

Direct current is the constant flow of current in one direction (e.g., flashlight, mobile phone); alternating current is the flow of current in one direction and the opposite direction (e.g., curling iron, table lamp).

Explain the difference between a volt and an amp.

Volts measure pressure while amps measure the strength of electric currents. Signup and view all the answers

Define ohm.

Ohm is the unit that measures the resistance of an electric current. Signup and view all the answers

Define watt and kilowatt.

Watts measure how much electric energy is being used in one second; a kilowatt is 1,000 watts. Signup and view all the answers

Explain the function of a fuse.

To prevent excessive current from passing through a circuit, it blows out or melts when the wire becomes too hot from overloading. Signup and view all the answers

What is the purpose of a circuit breaker?

To prevent overload. Signup and view all the answers

What is the purpose of grounding?

To complete an electric circuit and to carry the current safely away. Signup and view all the answers

List at least five steps to take for electrical safety.

Do not attempt to clean around electric outlets while equipment is plugged in. Do not touch metal objects at the same time if either is connected to an electric current. Avoid contact with water. Read all instructions. Inspect all electrical equipment regularly. Signup and view all the answers

List and describe the three main electric modalities used in cosmetology.

Galvanic current (a constant and direct current), micro-current (mirrors the body's natural electrical impulses), and Tesla high-frequency current (a thermal current used in scalp and facial treatments). Signup and view all the answers

List the other types of electrical equipment that cosmetologists use and describe how to use them.

Conventional hood hair dryers, ionic hair dryers, electric curling and flat irons, heating caps, haircolor processing machines, steamers, vaporizers, and light therapy equipment. Signup and view all the answers

Define the terms electromagnetic spectrum, visible light, and invisible light.

Electromagnetic spectrum is the name given to all forms of energy that exist. Visible light is light that can be seen; invisible light cannot be seen with the naked eye. Signup and view all the answers

Why must exposure to ultraviolet light be monitored carefully?

Because it can cause problems with the skin. Signup and view all the answers

What do the acronyms laser and LED represent?

Light emitting diode. Signup and view all the answers

List and describe the three main types of light therapy.

Lasers (used for hair removal and skin treatments), LED (used to reduce acne, increase circulation, and improve collagen), and intense pulse light (used to treat various skin concerns). Signup and view all the answers

Study Notes

Electric Current and Conductors

Electric current refers to the flow of electricity through a conductor.
Conductors allow electricity to pass, while nonconductors (insulators) do not transmit electricity effectively.

Types of Electric Current

Direct Current (DC): Flows in one direction; found in devices like flashlights and mobile phones.
Alternating Current (AC): Changes direction periodically; used in appliances such as curling irons and table lamps.

Electrical Units

Volt: Measures electrical pressure or potential.
Ampere (Amp): Measures the strength or flow of electric current.
Ohm: Unit that quantifies resistance within an electric circuit.
Watt: Measures energy consumption within one second; a kilowatt equals 1,000 watts.

Circuit Safety and Protection

Fuse: Protective device that melts or "blows" to stop excessive current flow, preventing circuit overload.
Circuit Breaker: Automatically interrupts current flow to prevent overload.
Grounding: Safety measure to complete circuits and safely carry stray currents away to avoid electric shock.

Electrical Safety Practices

Never clean around electric outlets while plugged in.
Avoid touching metal objects simultaneously while connected to current.
Stay dry and avoid water contact while using electrical devices.
Carefully read all equipment instructions before use.
Regularly inspect electrical equipment for hazards.

Electric Modalities in Cosmetology

Galvanic Current: Direct current producing chemical reactions in tissues through polarity.
Micro-Current: Mimics the body’s own electrical impulses for various treatments.
Tesla High-Frequency Current: Thermal, high-frequency energy used for scalp and facial care.

Electrical Equipment in Cosmetology

Includes hood dryers, ionic dryers, curling irons, heating caps, color processors, steamers, and light therapy devices, each serving specific functions in hair and skin care.

Electromagnetic Spectrum

Represents all forms of energy, encompassing visible light (perceptible by the human eye) and invisible light (not visible).

Ultraviolet Light Safety

Ultraviolet light exposure must be carefully monitored to prevent skin damage and related issues.

Light Therapy Technologies

Laser: Medical device for hair removal and skin treatments.
LED (Light Emitting Diode): Reduces acne, enhances circulation, and boosts collagen synthesis.
Intense Pulse Light (IPL): Addresses various skin conditions including spider veins and hyperpigmentation.