AdvancedA-002-001-009
Which of the following materials is used to make a semiconductor?
B
Answer
Circuit design and power supplies
Type
A
Sulphur
B
Silicon
C
Tantalum
D
Copper
Answer Notes
Silicon is the foundation of modern solid-state electronics. It is classified as a semiconductor because its electrical conductivity falls directly between that of a good conductor and a good insulator.
The other materials listed serve entirely different electrical purposes. Copper is an excellent conductor used extensively for wiring, tantalum is a metal commonly used to manufacture electrolytic capacitors, and sulphur is a non-metallic insulator.
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An element which is sometimes an insulator and sometimes a conductor is called a:
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Substances such as silicon in a pure state are usually good: