Arizona Esthetics State Board Practice Exam

Which unit is used to measure electric pressure?

1. Watt

2. Ohm

3. Volt

4. Ampere

The correct answer is: Volt

Electric pressure is measured in volts. This measurement indicates the potential difference in electric charge between two points in a circuit. It is analogous to water pressure in a pipe; just like higher water pressure can push water through a system more effectively, higher voltage can push electrical current through a circuit more efficiently. The volt is a fundamental unit in the field of electrical engineering and physics, and understanding it is crucial for topics related to electricity and esthetics equipment that rely on electrical power. In practical applications, knowing the voltage is essential for safe and effective use of various devices, as it helps estheticians understand the correct settings and requirements for their tools. The other units mentioned have different roles in the electrical system: watts measure power (the rate of energy transfer), ohms measure resistance (the opposition to the flow of current), and amperes measure the flow of electric current. Each of these units is important in its own right, but none directly measure electric pressure like the volt does.