Arkansas Esthetician Practice Exam

Galvanic current is used in electrotherapy because it is a direct current that can provide consistent and controlled stimulation to tissues. The other options are incorrect because A) Microcurrent is a very low intensity current and may not be suitable for some electrotherapy applications. C) Tesla refers to a unit of measurement and not a type of current used in electrotherapy. D) Ultrasonic refers to sound waves, which may have some therapeutic applications, but it is not considered a form of direct current used in electrotherapy.