What is a GFCI outlet designed to do?

A GFCI (Ground Fault Circuit Interrupter) outlet is specifically designed to protect against electric shock by monitoring the current flowing through the circuit. It continuously compares the amount of electrical current entering the outlet with the amount returning. If it detects any imbalance—indicating that some of the current is leaking through an unintended path, such as through a person—this safety device will quickly shut off power to the outlet. This feature is especially crucial in areas where water is present, such as kitchens and bathrooms, as water significantly increases the risk of electric shock.

Understanding why GFCI outlets are essential for safety can help emphasize the importance of their role in modern electrical systems. In contrast, the other options describe functions that are not related to the safety features of GFCI outlets. For example, providing additional power, boosting an electrical signal, or controlling the flow of electricity to multiple devices are not relevant to the primary function of GFCIs, which is focused on detecting faults and preventing hazards associated with electrical shocks.