logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics and Communication Engineering ‣ Materials and Components Comments
  • Question

  • The conductivity of intrinsic semiconductor is given by


  • Options
  • A. eni(?p - ?n)
  • B. eni(?p + ?n)
  • C. ni(?p + ?n)
  • D. ni(?p?n)

  • Correct Answer
  • eni(?p + ?n) 

    Explanation
    For intrinsic semiconductor,

    Conductivity = (Electron charge) x (Number of charge carriers) x (Sum of mobilities of holes and electrons).

    Materials and Components problems

    Search Results

    • 1. Material which lack permanent magnetic dipoles are known as

    • Options
    • A. paramagnetic
    • B. diamagnetic
    • C. ferromagnetic
    • D. ferrimagnetic
      • Discuss
    • 2. If e is the charge of an electron, R is the radius of its orbit and ? is the angular velocity of electron, the magnetic dipole moment ?m of the orbit is |?m| = e?R2.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Above ferroelectric curie temperature, spontaneous polarization in ferroelectric materials becomes stronger.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. If n denotes principal quantum number, the angular quantum number l = 0, 1... (n - 1).

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. For a permanent magnetic material

    • Options
    • A. the residual induction and coercive field should be large
    • B. the residual induction and coercive field should be small
    • C. area of hysteresis loop should be small
    • D. initial relative permeability should be high
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.