Q.

Consider the following statements.(A) In an intrinsic semiconductor number of holes and electrons are same.(B) In an  p type extrinsic semiconductor number of holes doesn't depend on doping concentrations.

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a

Both (A) and (B) are true.

b

(A) is true but (B) is false.

c

(A) is false but (B) is true.

d

Both (A) and (B) are false.

answer is B.

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Detailed Solution

In intrinsic semiconductor holes and electrons have same number density. In an extrinsic semiconductor majority charge carriers concentration depends on doping concentration.
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