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  • Question

  • The capacitance of a capacitor is not affected by


  • Options
  • A. area of plates
  • B. thickness of plates
  • C. ?r
  • D. distance between plates

  • Correct Answer
  • thickness of plates 

    Explanation
    Capacitance depends on area, distance and ?r but not on thickness of plates.

    Materials and Components problems

    Search Results

    • 1. The charge per proton is

    • Options
    • A. 1.6 x 10-19 C
    • B. 2.6 x 10-19 C
    • C. 0.6 x 10-19 C
    • D. 1.6 x 10-13 C
      • Discuss
    • 2. Assertion (A): If an atom of polarizability a is placed in homogeneous field E, the energy stored is 0.5 aE2.

      Reason (R): Capacitance of an isolated conducting sphere R in vacuum is 4 p?0 R farads.


    • 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. Schrodinger wave equation is partial differential equation.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. We can know the arrangement of atom in a material by studying electron diffraction pattern.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. If ?p is permanent dipole moment and T is absolute temperature, the orientation polarization of polyatomic gases is

    • Options
    • A. proportional to ?p2T
    • B. proportional to
    • C. proportional to ?p T
    • D. proportional to
      • Discuss
    • 6. Hall effect is observed in a specimen (metal or semi- conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

    • Options
    • A. normal to both current and magnetic field
    • B. in the same direction as current
    • C. in a direction anti parallel to magnetic field
    • D. none of the above
      • Discuss
    • 7. With increase in temperature, the electrical conductivity would

    • Options
    • A. increase in metals as well as in intrinsic semiconductor
    • B. increase in metals but decrease in intrinsic semiconductor
    • C. decrease in metals but increase in intrinsic semiconductor
    • D. decrease in metals as well as in intrinsic semiconductor
      • Discuss
    • 8. Yettrium-iron garnet (Y2Fe5O12) is a soft magnetic material suitable for applications involving

    • Options
    • A. dc
    • B. 50 Hz ac
    • C. ac of a few K Hz
    • D. ac of a few hundred MHz
      • Discuss
    • 9. For a diamagnetic material, ?r = 1.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. An electron for which l = 0 has zero orbital magnetic dipole moment.

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

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