Lesson eLearning

Silicon is doped with arsenic atoms. The resulting semiconductor is classified as:

easy MCQ 1 mark Class 12 · Physics · Semiconductor Electronics Materials Devices and Simple Circuits
  1. A) Intrinsic
  2. B) P-type
  3. C) N-type
  4. D) Compensated
Answer
C) N-type

The correct answer is C) N-type — Select the option that states N‑type.

Step-by-step solution

  1. Arsenic has five valence electrons, one more than silicon, so it donates an extra electron to the crystal lattice.
  2. The extra electrons become majority carriers, giving the material an excess of negative charge carriers.
  3. Therefore the semiconductor behaves as an N-type material.
  4. Select the option that states N‑type.
Common mistake: Choosing P‑type instead of N‑type because of confusion about donor vs acceptor atoms

Concept tested: Doping type of semiconductor

Published · How this solution was prepared and checked

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