logo

CuriousTab

CuriousTab

Discussion

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

  • Assertion (A): Diamond and carborudum are both very hard materials.

    Reason (R): Valence band can be extremely strong.


  • Options
  • A. Both A and R are true and R is correct explanation of A
  • B. Both A and R are true but R is not correct explanation of A
  • C. A is true but R is false
  • D. A is false but R is true

  • Correct Answer
  • Both A and R are true and R is correct explanation of A 

    Explanation
    Valence bond results in hardness.

    Materials and Components problems

    Search Results

    • 1. If there are no permanent dipoles in a dielectric material, the dielectric constant is independent of temperature.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Assertion (A): Magnetic susceptibility of copper is -0.5 x 10-5.

      Reason (R): Copper is diamagnetic material.


    • Options
    • A. Both A and R are true and R is correct explanation of A
    • B. Both A and R are true but R is not correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true
      • Discuss
    • 3. If the valence electron is separated from a copper atom, the remaining part of atom has a net charge of

    • Options
    • A. 1
    • B. - 1
    • C. 0
    • D. + 3
      • Discuss
    • 4. The orientation polarization of a polyatomic gas is inversely proportional to absolute temperature.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. In a virgin specimen of iron, the direction of spontaneous magnetisation varies from domain to domain.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. Lines of magnetic field cannot intersect.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The equation D = ?0?r E refers only to isotropic materials.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The spin angular momentum along a given direction is either or .

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. A dielectric is subjected to alternating field. The dielectric losses are potential to

    • Options
    • A. real part of dielectric constant
    • B. imaginary part of dielectric constant
    • C. both real and imaginary parts of dielectric constant
    • D. either real or imaginary part of dielectric constant
      • Discuss
    • 10. The number of tightly bound electrons in silicon atom are

    • Options
    • A. 14
    • B. 10
    • C. 6
    • D. 4
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.