Question

What are the special features of heating a wire

Answer 1

1. It should have high resistivity so that a small length of wire is required to produce a given amount of heat.
2. It should have high melting point so that high temperature may be obtained.
3. It should not oxidize at high temperature to ensure long life.
4. It should have high specific resistance so that overall length may be smaller to produce a certain amount of heat.
5. It should have low temperature coefficient so that resistance remains appreciably constant even with increase of temperature. This helps in accurate control of temperature.
6. It should be non-corrosive
7. It should be economical