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Q.

A doped semiconductor is

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a

electrically neutral

b

may be positive or negative

c

negatively charged

d

positively charged

answer is C.

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Detailed Solution

The p-type and n-type semi conductors are formed when the impurity atoms, which themselves are electrically neutral, are added to pure semiconductor which is also electrically neutral. Hence the p or n-type semiconductor formed is electrically neutral. The letter p  in p-type semiconductor indicate the majority charge carriers and not the net charge in the semiconductor.

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A doped semiconductor is