Resistivity of some materials are given. Observe the table and answer the questions
Material Ρ(Ω-m) at 200C
Copper 1.68 x 10-8
Nichrome 1.10 x 10-6
Silicon 6.40 x 102
Germanium 4.60 x 10-1
a) Name the material which is used to make the heating elements of irons,
toasters?
b) Name the materials which are used to make diodes, transistors and
integrated circuits?
Answer:
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