When a piece of pure silicon is doped with aluminium, then
A. the conductivity of the doped silicon piece will remain the same
B. the doped silicon piece will become n-type
C. the doped silicon piece will become p-type
D. the resistivity of the doped silicon piece will increase
Answer: Option C
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A. copper
B. silicon
C. silica
D. chromium
Which one of the following is not a semiconductor?
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B. Germanium
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. . . . . . . . was later discovered and replaced with silicon.
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