Utah Esthetician State Board Practice Exam

Disable ads (and more) with a membership for a one time $4.99 payment

Prepare for the Utah Esthetician State Board Test. Study with flashcards and multiple choice questions, each with hints and explanations. Be ready for your exam!

Practice this question and more.

What does hertz measure in electrical terms?

The unit of electrical force
The resistance in a circuit
The unit of frequency
The intensity of electric current

The correct answer is: The unit of frequency

Hertz is defined as a unit of frequency that measures the number of cycles per second of a periodic phenomenon. In the context of electrical terms, it specifically refers to the frequency of alternating current (AC) or other time-varying signals. For instance, in electrical systems, a frequency of 60 hertz means that the electric current changes direction 60 times per second. Understanding this concept is crucial for estheticians who work with various electrical devices, ensuring they operate within the correct frequency ranges for safety and effectiveness. The other options refer to different electrical concepts. The unit of electrical force is measured in volts, resistance is measured in ohms, and electric current intensity is measured in amperes. Each of these units plays a vital role in electrical engineering and applications but does not relate to frequency, which is precisely what hertz measures.