Arizona Esthetics State Board Practice Exam

What is measured in amperes (A)?

1. Electric voltage

2. Electric resistance

3. Electric current

4. Electric power

The correct answer is: Electric current

Amperes (A) are the unit of measurement for electric current, which is the flow of electric charge in a circuit. When considering electrical systems, current is the rate at which electric charge flows past a point in a circuit, and it is a crucial concept in understanding how electricity operates in various applications, including those relevant to esthetics technologies like lasers and microdermabrasion devices. Electric voltage, measured in volts, represents the difference in electric potential between two points in a circuit. Electric resistance is measured in ohms and describes the opposition to the flow of current in a material. Electric power, on the other hand, is measured in watts and signifies the rate at which electrical energy is consumed or converted. Understanding these distinct characteristics helps estheticians safely utilize electrical equipment in their practices.