Physics for IGCSE & O level - Electricity (Section 7 - No. 36)

What is the purpose of the earth (grounded) wire?

To carry the current back to the source.

To protect the circuit from over voltage.

To provide a low-resistance path to the ground in case of a fault.

To increase the voltage

The earth (grounded) wire provides a path for current to flow to the ground in case of a fault, preventing electric shock.