A plug connects a device to the mains electricity supply ... this wire connects to the alternating potential difference pushing the current in the circuit Fuse A glass or ceramic canister ...

A plug connects a device to the mains electricity supply ... that also connects to the cable in the wall and completes the circuit Earth wire Copper wire coated in striped plastic that provides ...

This module introduces the basic principles underlying electric circuits. The idea of a circuit, and the concepts of voltage, current and power are introduced for both alternating and direct sources.