What do cells and batteries supply?

What is an alternating current?

Which supply is mains electricity?

What is the frequency of mains electricity in the UK?

What is the potential difference of the mains electricity in the UK?

What may a diode be used for?

How are most electrical appliances connected to the mains?

What colour is the live wire?

What colour is the neutral wire?

What colour is the earth wire?

What happens if an electrical fault causes too great a current flow?

What happens when the current in a fuse wire exceeds the rating of the fuse?

What is the link between cable thickness and fuse value?

What are RCCBs?

How do RCCBs operate?

What usually happens to appliances with metal cases?

Do appliances that are double insulated have an earth wire connection?

What do the earth wire and fuse do?