A ground-fault interrupter in an electric outlet prevents injuries because it contains an electronic circuit that detects differences in current caused by an extra path and opens the circuit. What is the function of a ground-fault interrupter in an electric outlet?
1) To prevent injuries by detecting differences in current and opening the circuit
2) To provide a path for extra current and prevent injuries
3) To regulate the flow of current in an electric outlet
4) To increase the voltage in an electric outlet