Wisconsin Esthetics State Board Practice Test

Which type of current is described as an alternating current that produces a mechanical effect?

1. Galvanic current

2. Faradic current

3. Sinusoidal current

4. Direct current

The correct answer is: Sinusoidal current

The correct answer, sinusoidal current, is characterized as an alternating current that generates a mechanical effect. This type of current produces a smooth, wave-like pattern that allows for varying polarity and intensity, which can effectively stimulate muscles and promote circulation. Sinusoidal currents are utilized in various esthetic treatments because they can facilitate deep muscle contractions without causing discomfort to the client, making them suitable for therapeutic applications, such as muscle toning and pain relief. Galvanic current, on the other hand, is a direct current that is primarily used for iontophoresis and other chemical applications in skin care, not for mechanical effects. Faradic current, while also alternating, is more typically associated with stimulating the peripheral nervous system and muscle tissues through interrupted impulses but does not have the same smooth flow as sinusoidal current. Direct current is a constant flow of electricity in one direction and does not create a mechanical effect in the same context as sinusoidal.