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  • Question
  • When Schrodinger equation is applied to the motion of electron in the field of protons, the physically acceptable solutions for the wave function exist for quantum number which are


  • Options
  • A. 2
  • B. 3
  • C. 4
  • D. 5

  • Correct Answer


  • Explanation
    There are three principal quantum numbers.

    Materials and Components problems


    Search Results


    • 1. ?r is determined by the atomic structure of the dielectric.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. The number of turns in a coil is doubled. If initial time constant is T, the new time constant is

    • Options
    • A. T
    • B. 2T
    • C. 4T
    • D.
    • Discuss
    • 3. When temperature is above ferromagnetic Curie temperature, a ferromagnetic material

    • Options
    • A. becomes a paramagnetic material
    • B. becomes a very strong ferromagnetic material
    • C. becomes diamagnetic material
    • D. none of the above
    • Discuss
    • 4. The number of valence electrons in silicon atom is

    • Options
    • A. 4
    • B. 2
    • C. 1
    • D. zero
    • Discuss
    • 5. In which of the following semiconductor are holes minority carriers

    • Options
    • A. extrinsic
    • B. p type
    • C. n type
    • D. intrinsic
    • Discuss
    • 6. If B, H and M denote flux density, field intensity and magnetisation, B = ?0 (H + M).

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. Assertion (A): An amorphous material is obtained when mobility of atoms is inhibited during solidification.

      Reason (R): Crystalline state is a natural state for most solids.


    • 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
    • 8. An air cored inductance is a

    • Options
    • A. linear circuit element because its reactance varies linearly with voltage at a fixed frequency
    • B. linear circuit element because its current varies linearly with voltage at a fixed frequency
    • C. nonlinear circuit element due to saturation of core
    • D. nonlinear circuit element because v =
    • Discuss
    • 9. The number of valence electrons in trivalent impurity is

    • Options
    • A. 5
    • B. 4
    • C. 3
    • D. 1
    • Discuss
    • 10. Assertion (A): In a conductor, current density remains constant in time as long as E is constant.

      Reason (R): In a conductor, J = ?E.


    • 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


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