Name two safety measures commonly used in electric circuits and appliances. Explain one of the measures in brief. [3 MARKS]
Each point: 1 Mark
1. Earth wire is used to remove any leakage current from any metallic part of an appliance or an insulated wire.
2. Electric fuse has a high resistance and low melting point and disconnects the circuit in case a short circuit occurs.
3. Electric fuse is a safety device used in electric circuits to protect the circuit and appliances from damage due to overloading and short circuit. Fuse wire is made of a metal or an alloy of metals like lead, tin, aluminium and copper. Fuse wire is connected in series with the live wire.