What unit indicates the flow of electric charge in a circuit?

The unit that indicates the flow of electric charge in a circuit is the Ampere. It measures the amount of electric charge that passes a point in the circuit per unit time, specifically one Coulomb of charge per second. Understanding this concept is crucial for anyone in the field of beauty therapy, especially when dealing with electrical equipment such as high-frequency machines or galvanic devices, as it helps practitioners comprehend how electrical currents interact with skin and other tissues.

The other units mentioned—Watt, Hertz, and Ohm—serve different purposes within electrical systems. Watts measure power, which is the rate at which energy is consumed or produced. Hertz indicates frequency, which refers to how often a cycle occurs in a second, especially important in the context of alternating currents. Ohms measure resistance, which quantifies how much a material opposes the flow of electric current. Having a solid grasp of these definitions is essential, but in terms of measuring the flow itself, the Ampere is unequivocally the right choice.