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  • Question

  • Assertion (A): Electronic polarizability increases as atoms becomes larger.

    Reason (R): For rare gas, ?0(?r - 1) E = Nae, where N is number of atoms/m3 and ae is electronic polarizability of 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

  • Correct Answer
  • Both A and R are true but R is not correct explanation of A 

    • Materials and Components problems

    Search Results

    • 1. The v-i relation for an arc is v = 44 + . If v = 50 V, i =

    • Options
    • A. 10 A
    • B. 5 A
    • C. 2 A
    • D. 0.5 A
      • Discuss
    • 2. A characteristic property of crystal is its periodicity of structure.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The two conductors of a transmission line carry equal current I in opposite direction. The force on each conductor is

    • Options
    • A. proportional to I
    • B. proportional to I2
    • C. proportional to distance between the lines
    • D. proportional to I3
      • Discuss
    • 4. Specific resistance of silver is about

    • Options
    • A. 0.16 x 10-8 ?-m
    • B. 1.64 x 10-8 ?-m
    • C. 16 x 10-8 ?-m
    • D. 164 x 10-8 ?-m
      • Discuss
    • 5. Silicon and germanium have diamond structure. The number of atoms in a volume equal to a3 where a is the edge of elementary cube are

    • Options
    • A. 32
    • B. 16
    • C. 8
    • D. 4
      • Discuss
    • 6. On the basis of the type of chemical bonds, solids may be classified into

    • Options
    • A. ionic crystals
    • B. ionic and valence crystals
    • C. ionic crystal, valence crystals and metals
    • D. ionic crystals, valence crystals, metal and vander wall crystals
      • Discuss
    • 7. Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. Debye temperature of metals is

    • Options
    • A. about 10 K
    • B. about 200 K
    • C. about 600 K
    • D. about 2 K
      • Discuss
    • 9. A leakage capacitor can be represented by a capacitance C and resistance R in parallel C.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A wire is carrying current I. The field intensity H at a distance r from the wire

    • Options
    • A. is directed towards wire
    • B. is directed away from wire
    • C. is tangential every where to a circle of radius r
    • D. none of the above
      • Discuss

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