Pennsylvania Esthetician State Board Practice Exam

Which frequency is associated with high-frequency currents used in esthetics?

1. 50-60Hz

2. 400-500Hz

3. 1-10kHz

4. 10-20kHz

The correct answer is: 10-20kHz

The frequency range associated with high-frequency currents used in esthetics is indeed within the range of 10-20 kHz. High-frequency machines operate typically at these higher frequencies because they can provide various benefits for skin treatments, including improved blood circulation, stimulation of cellular turnover, and enhanced product penetration. This frequency is effective for various skin conditions and is widely used in treatments for acne, aging skin, and to promote a healthy, glowing complexion. In contrast, the other options present frequencies outside of this effective range for high-frequency treatments. Frequencies lower than 10 kHz, such as those listed in the first three options, do not have the same physiological effects typical of high-frequency treatments. For instance, 50-60 Hz is commonly associated with standard electrical frequency in power systems and is not related to high-frequency aesthetics. Frequencies like 400-500 Hz or 1-10 kHz are also outside of the parameters known to be beneficial for high-frequency skin treatments, as they do not provide the necessary stimulation and therapeutic benefits that the 10-20 kHz frequency does.