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Which of the following statements regarding doped semi conductors is correct
(1) In n-type semiconductors, electrons are the majority carriers and holes are the minority carriers.
(2) In p-type semiconductors, holes are the majority carriers and electrons are the minority carriers.

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only 2

both 1,2

only 1

neither 1, 2

answer is C.

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Detailed Solution

In p- type semiconductors dopant is trivalent impurities such as boron.

These are group III dopant. These are atoms with a hole in their valance shell. (only missing one electron. )

In n- type semiconductors dopant is pentavalent such as arsenic

Pentavalent impurities are group V atom with an extra electron in their valance shell .

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