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Question

Which of the following is a semi-conductor ?

A
Constantan
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B
Porcelain
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C
Germanium
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D
Silicon
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Solution

The correct options are
C Germanium
D Silicon
A semiconductor is a material which has electrical conductivity between that of a conductor such as copper and that of an insulator such as glass. Among the given options only silicon and germanium belonging to group IVA of periodic table has this property.

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