Final answer:
Proper ground fault protection in a power drill prevents shock by detecting the loss of current to unintentional paths. A ground fault interrupter (GFI) is designed to quickly shut off power to the circuit in case of a fault or contact with conducting material, preventing the flow of dangerous electrical current through the user's body.
Step-by-step explanation:
When using a power drill, proper ground fault protection will prevent shock by detecting the loss of current to unintentional paths. A ground fault interrupter (GFI) is a device that is designed to protect against electrical shock by quickly shutting off power to the circuit if it detects a loss of current. This can happen if the drill comes into contact with a conducting material or if there is a fault in the wiring. By tripping the circuit, the GFI prevents the flow of dangerous electrical current through the user's body, potentially saving them from injury or electrocution.