Which of the following is NOT a type of electrical current?

The option indicating "instantaneous current" is not recognized as a standard type of electrical current in the context of esthetics or general electrical theory. In the field of esthetics, it is important to understand the types of electrical currents utilized in various treatments.

Direct current (DC) involves a constant flow of electric charge in one direction, used in treatments like galvanic therapy. Alternating current (AC) involves the flow of electric charge that regularly reverses direction, commonly used for modalities like microcurrent facials. Inductive current, while less common, refers to currents created through electromagnetic induction and can be used in specific therapeutic applications.

The term "instantaneous current" does not refer to a standard electrical current classification and does not have established applications within esthetics or electrical practices. Therefore, identifying it as not being a type of electrical current is accurate and aligns with recognized terminology and applications within the field.