Q.

A P-type semiconductor is formed when

A . As impurity is mixed in Si 

B. Al impurity is mixed in Si

C. B impurity is mixed in Ge 

D. P impurity is mixed in Ge

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a

A and D

b

B and D

c

B and C

d

A and C

answer is C.

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Detailed Solution

Boron and aluminium are trivalent impurities.

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A P-type semiconductor is formed whenA . As impurity is mixed in Si B. Al impurity is mixed in SiC. B impurity is mixed in Ge D. P impurity is mixed in Ge