Multiple choice

Safety fuse wire used in domestic electrical appliances is made of metal of low

  1. Resistance

  2. Melting point

  3. Specific gravity

  4. None of above

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Safety fuse wires must melt quickly when excessive current flows to break the circuit and prevent damage. A metal with low melting point ensures the fuse blows at the designed current rating, protecting appliances from overheating or fire. High resistance would cause voltage drop without necessarily melting.