logo

CuriousTab

CuriousTab

Discussion

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

  • At 0 K, silicon and germanium behave like monoatomic crystals.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • Materials and Components problems

    Search Results

    • 1. A magnet does not attract

    • Options
    • A. nickel
    • B. iron
    • C. copper
    • D. iron and copper
      • Discuss
    • 2. The number of protons in germanium atom is

    • Options
    • A. 4
    • B. 16
    • C. 28
    • D. 32
      • Discuss
    • 3. Tesla is a unit of

    • Options
    • A. flux
    • B. field strength
    • C. flux density
    • D. MMF
      • Discuss
    • 4. The colour code on a carbon resistor is brown-black-red-gold. The value of resistance is

    • Options
    • A. 100 ?
    • B. 1000 ?
    • C. 1000 ? ± 5%
    • D. 1000 ? ± 10%
      • Discuss
    • 5. In the wave mechanical theory, the maximum of the charge distribution in the ground state occurs for a distance from the nucleus equal to

    • Options
    • A. first Bohr radius
    • B. second Bohr radius
    • C. third Bohr radius
    • D. either first or second Bohr radius
      • Discuss
    • 6. Two coaxial metallic cylinders have radii R1 and R2. The space between them is filled with a dielectric having dielectric constant ?r. The capacitance per metre length is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. Hysteresis curve is associated with motion of domain walls.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The induced magnetic dipole moment has a direction opposite to the applied magnetic field.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. A sample of N type semiconductor has an electron density of 6.25 x 1018/cm3 at 300 K. If intrinsic concentration of carriers in this sample is 2.5 x 1013/cm3 at this temperature, the hole density is

    • Options
    • A. 106 / cm3
    • B. 108 / cm3
    • C. 1010 / cm3
    • D. 1012 / cm3
      • Discuss
    • 10. When an electron moves at velocity v in combined electric and magnetic fields E and H, the Lorentz force F is F = - e(E + v x B).

    • Options
    • A. True
    • B. False
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.