Milady Esthetics State Board Practice Test

What symbol typically marks a cathode?

1. Positive symbol

2. Negative symbol

3. Neutral symbol

4. None of the above

The correct answer is: Negative symbol

In the context of electrotherapy and electrical circuits, the cathode is typically marked with a negative symbol. This is because the cathode is the electrode where reduction takes place, and it attracts cations, which are positively charged ions. The negative charge of the cathode is vital for the flow of electrons from the cathode to the anode, creating a current. Understanding this distinction is essential in electrical applications, including those related to esthetics, where devices may use electrical currents for various treatments. The negative symbol clearly indicates the role of the cathode in these processes. The positive symbol relates to the anode, which serves a different function, while a neutral symbol does not denote the active nature of electrodes in electrotherapy applications. Thus, selecting the negative symbol for the cathode accurately reflects its electrical properties and functions.