Correct Answer - Option 2 : Iron
The correct answer is Iron.
The material used for fuse elements must have the following properties:
- Low melting point
- Low ohmic loss
-
High conductivity (or low resistivity)
- Low cost
- Free from detraction
The materials used for fuse:
- The material mainly used as fuse elements are tin, lead, silver, copper, zinc, aluminium, and an alloy of lead and tin
- An alloy of lead and tin is used for small current rating fuses
- For current exceeding 15 A, this alloy is not used as the diameters of the wire will be larger and after fusing the metal released will be excessive.
- Beyond 15 A rating circuit, copper wire fuses are employed
Iron is not used as a fuse wire.
