1. Fuses

2. What are they Fuses break the circuit if there's a fault Breaks if there is too much current Protection of the wire and the appliance When too much current flows the fuse melts and breaks the circuit

3. What they are Fuses are made of ratings Common ones are 3.5 and 13amps Slightly higher than the current of the appliance

4. Where are they used Used in cars to protect the wires and appliances used In houses to protect any appliances and the wires that needed to be used In planes they use them to protect the electrical circuits the protect the equipment to allow pilots to keep the aircraft from crashing