Electricity

Domestic supply of electricity has a frequency of 50 Hz and is about 230 V.

Direct current flows in one direction, and is usually supplied by a battery

Alternating current changes direction, and is usually supplied from the mains

Live wire - Insulation is brown, and it carries the potential difference from the source. It has a potential difference of 230 V.

Neutral wire - Insulation is blue, and completes the circuit. It has a potential difference of 0 V

Earth wire - Insulation is green and yellow, and it acts a safety precaution, to ensure the appliance does not become live. It has a potential difference of 0 V.

A live wire is dangerous because it can cause…