A) It can be drawn out into wires easily
B) It has high resistivity
C) It resists oxidation in air when red hot
D) Both b and c are correct
Correct Answer: D
Solution :
[d] Most heating elements use Nichrome 80/20 (80% nickel, 20% chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time. Material beneath this layer will not oxidize, preventing the wire from breaking or burning out.
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