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

  • Assertion (A): Holes are majority carriers in p type semiconductor.

    Reason (R): In p type semiconductor, the electrons produced by thermal agitation recombine with holes.


  • 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 

    • Materials and Components problems

    Search Results

    • 1. In p type semiconductor, the conductivity due to holes is (e = charge on hole, ?p = hole mobility, p = hole concentration)

    • Options
    • A.
    • B.
    • C. pe?p
    • D.
      • Discuss
    • 2. Spontaneous magnetisation is characteristic of ferromagnetic materials.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The units for intrinsic strength of dielectric are

    • Options
    • A. kV
    • B. kV/m
    • C. A
    • D. A/m
      • Discuss
    • 4. Which inductor is linear?

    • Options
    • A. Air cored
    • B. Cast iron cored
    • C. Sheet steel cored
    • D. Iron alloy cored
      • Discuss
    • 5. All magnetic materials exhibit the phenomenon of saturation.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. A characteristic property of crystal is its periodicity of structure.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. 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

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