Pennsylvania Esthetician State Board Practice Exam

What type of electric current has electrons that move at an even rate and flow only in one direction?

1. Alternating Current

2. Direct Current

3. Oscillating Current

4. Static Current

The correct answer is: Direct Current

The type of electric current characterized by electrons moving at an even rate and flowing only in one direction is known as Direct Current (DC). This seamless and consistent flow of electrons is significant in various applications, particularly in powering electronic devices, batteries, and equipment that requires stable voltage levels. In contrast, Alternating Current (AC) involves the flow of electrons changing direction periodically, which is essential for power distribution systems. Oscillating Current refers to a current that varies in strength and direction, often found in certain electronic circuits, while Static Current refers to the buildup of electrical charges that remain fixed and do not flow. Understanding the nature of Direct Current is critical for estheticians, especially when using devices that rely on specific types of electrical flow for treatments like microcurrent therapy or facial devices. This knowledge aids in ensuring the safe and effective use of technology in esthetics.