True or False: A ground fault circuit interrupter is used to prevent electrical shock by interrupting current flow.

A ground fault circuit interrupter (GFCI) is indeed designed to prevent electrical shock by quickly interrupting the flow of current when it detects an imbalance between the incoming and outgoing current in a circuit. This can occur when current leaks from the circuit, such as through a person who has come into contact with a live electrical component.

When a GFCI detects this imbalance, it acts within milliseconds to cut off the electrical supply, reducing the risk of serious injury or fatality due to electric shock. This is particularly crucial in areas where the risk of electrical shock is heightened, such as in wet or damp locations, making the use of GFCIs a standard safety measure in such installations.

The statement is true because the primary purpose of a GFCI is indeed to prevent electrical shocks by interrupting the flow of current when necessary, making it an essential safety device in residential and commercial electrical systems.