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

  • The resistance of a superconductor is


  • Options
  • A. low
  • B. very low
  • C. very very low
  • D. zero

  • Correct Answer
  • zero 

    • Materials and Components problems

    Search Results

    • 1. The application of magnetic field to superconducting material

    • Options
    • A. increases transition temperature
    • B. decreases transition temperature
    • C. has no effect on transition temperature
    • D. may increase or decrease the transition temperature
      • Discuss
    • 2. As per Curie-Weiss law, the magnetic susceptibility of a material varies as

    • Options
    • A. T-2
    • B.
    • C. T
    • D. T2
      • Discuss
    • 3. For a superconductor, magnetisation M in a field H is

    • Options
    • A. extremely small
    • B. - H
    • C. - I
    • D. zero
      • Discuss
    • 4. Resistivity of copper is lower than that of nickel. When a small percentage of copper is added to nickel, the resistivity

    • Options
    • A. increases
    • B. decreases
    • C. may increase or decrease
    • D. remains the same
      • Discuss
    • 5. Transformer oil is

    • Options
    • A. refined vegetable oil
    • B. refined mineral oil
    • C. mixture of vegetable and mineral oil
    • D. none of the above
      • Discuss
    • 6. In Fermi-Dirac statistics, the probability of electron occupation of an energy level equal to Fermi level is

    • Options
    • A. 0
    • B. 0.25
    • C. 0.5
    • D. 1
      • Discuss
    • 7. If ?r = ?r' - j?r" tan ? = .

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The maximum temperature limit of class B insulation is

    • Options
    • A. 90°C
    • B. 105°C
    • C. 120°C
    • D. 130°C
      • Discuss
    • 9. Resistivity of metals consists of two parts, one part constant and the other temperature dependent.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Assertion (A): The regular or irregular stacking of atoms has importanteffect on properties of materials.

      Reason (R): The arrangement of atoms in a given material can be studied using X-rays.


    • 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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