Physics for IGCSE & O level - Electricity (Section 5 - No. 43)
What is the main purpose of an earth wire in an electrical appliance?
To reduce the current flow.
To provide a path for fault current to flow to earth.
To increase the voltage.
To insulate the appliance.
คำอธิบาย
The earth wire provides a path for fault current to flow to ground, preventing electric shock.