In a monopolar setup, which component completes the circuit by returning current to the generator?

• A. Acts as a secondary cutting electrode
• B. Completes the circuit by returning current to the generator
• C. Not necessary if using bipolar
• D. Located near active electrode to guide current

Answer: (B)

In monopolar electrosurgery, energy must travel from the generator, through the active electrode and tissue, back to the generator. The return path is provided by the dispersive (return) electrode placed on the patient’s body. Its large surface area spreads the current to minimize focal heating and completes the circuit by returning current to the generator. The other ideas don’t fit: there isn’t a separate secondary cutting electrode in monopolar, the return path is essential (unlike in bipolar where current stays between two instrument tips), and the return pad is positioned away from the active site to distribute current, not near it to guide it.