Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET
Exam
NEET
Subject
Physics
Chapter
Semiconductors

NEET · Physics · Semiconductors

What is the number of electrons and holes in a pure Si crystal...

What is the number of electrons and holes in a pure Si crystal doped by 1 ppm concentration of pentavalent As, given that the crystal has a concentration of 5 × 1028atoms m–3and ni=1.5×1016m–3?

Options

  1. A6.5 × 109m–3
  2. B5.5 × 109m–3
  3. C3.5 × 109m–3
  4. D4.5 × 109m–3

Correct answer

D. 4.5 × 109m–3

Step-by-step solution

Correct Option is : (D)
4.5 × 109m–3
Practice Semiconductors on Quantrex Academy →

More from Semiconductors

For two inputs A and B and output Y, the Boolean expression for NOR gate is MHT CET Medical 2026For an n-type semiconductor, the relation between the number density ' n_h ' and ' n_e '… MHT CET Medical 2026A silicon crystal is doped with 5 × 10^ 17 \ cm^ -3 atoms of boron. The electron… MHT CET Medical 2026If the current gain in common-base configuration (α ) of a transistor increases from 0.95… MHT CET Medical 2026Out of the following what is used to detect the intensity of light ? MHT CET Medical 2026The color of light emitted by an LED is determined primarily by which of the following… MHT CET Medical 2026Which of the following is true for a p-type semiconductor? MHT CET Medical 2026In case of semiconductors, the band gap between the valence band and conduction band is MHT CET Medical 2026 Full Semiconductors list All NEET PYQs