Identify the correct statements among the following.
(A) At 0 K, the resistance of a semiconductor is infinite.
(B) In an n-type semiconductor, the electron concentration is approximately equal to the concentration of donor atoms.
(C) In p-type semiconductors, the acceptor levels lie near the conduction band.
(D) In n-type semiconductors, the charge carriers are both electrons and holes.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A), (B) and (D) only
Analysis of statements:
(A) At 0 K, the resistance of a semiconductor is infinite → True. No electrons are in the conduction band at absolute zero.
(B) In an n-type semiconductor, the electron concentration is approximately equal to the concentration of donor atoms → True. Electrons donated by donor atoms dominate.
(C) In p-type semiconductors, the acceptor levels lie near the conduction band → False. Acceptor levels lie near the valence band.
(D) In n-type semiconductors, the charge carriers are both electrons and holes → True. Electrons are majority carriers, holes are minority carriers.
Correct Statements: (A), (B), and (D)