What is the purpose of a ground loop in electrical systems?

The purpose of a ground loop in electrical systems is to complete a circuit pathway. Ground loops arise when there are multiple grounding paths in a system, allowing for a continuous circuit through the ground connections. This can enable the safe dissipation of electrical noise and help prevent interference in the system, ensuring stable operation of devices.

Completing a circuit is essential for the proper functioning of electrical systems. If a circuit isn't complete, devices may not operate reliably, potentially leading to improper measurements or performance, particularly in sensitive equipment like EEG systems. Thus, the proper management of ground loops contributes to optimal electrical performance and safety.