What is a GFCI outlet, and where is it used?

A GFCI outlet, or Ground Fault Circuit Interrupter, is designed to protect people from electric shock by interrupting the circuit if it detects an imbalance between the incoming and outgoing current. This situation typically arises when the current leaks through a person who has made contact with the electrical source, greatly increasing the risk of severe injury or fatality.

These outlets are specifically utilized in wet or damp areas, such as kitchens, bathrooms, and outdoor locations. This is because water significantly enhances the risk of electric shock, and the GFCI provides a critical line of defense in these environments. The technology behind GFCI outlets enables them to react quickly—often within a fraction of a second—to a ground fault, ensuring safety in areas where moisture or water could be present.

The other choices suggest incorrect interpretations or applications of terms and devices unrelated to GFCI functionality. By focusing on the correct identification and application of GFCI outlets, it’s clear how they serve a vital safety role in specific environments, making option B the appropriate answer.