logo

CuriousTab

CuriousTab

Discussion

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

  • As the temperature of a pure silicon specimen is increased


  • Options
  • A. the number of free electrons increases
  • B. the number of holes decreases
  • C. the number of holes increases
  • D. the number of free electrons and holes increases

  • Correct Answer
  • the number of free electrons and holes increases 

    • Materials and Components problems

    Search Results

    • 1. Match the following:

      List I (type of controller) List II (Operation)
      A. Pneumatic controller 1. Flexible operation
      B. Hydraulic controller 2. High torque high speed operation
      C. Electronic controller 3. Fire and explosion proof operation


    • Options
    • A. A-1, B-3, C-2
    • B. A-1, B-2, C-3
    • C. A-3, B-1, C-2
    • D. A-3, B-2, C-1
      • Discuss
    • 2. Match the following:

      List I (Operator) List II (Description)
      A. & & 1. Assignment
      B. | | 2. Logical AND
      C. = 3. Logical OR


    • Options
    • A. A-1, B-2, C-3
    • B. A-2, B-3, C-1
    • C. A-3, B-2, C-1
    • D. A-1, B-3, C-2
      • Discuss
    • 3. Match the following:

      List I (Instrument) List II (Parameters)
      A. Moving coil galvanometer 1. High inertia, soft spring control
      B. Ballistic galvanometer 2. No control, high damping
      C. Vibration galvanometer 3. Soft spring control, critical damping
      D. Moving coil flux meter 4. Low inertia, tuned spring control


    • Options
    • A. A-4, B-2, C-3, D-1
    • B. A-1, B-3, C-2, D-4
    • C. A-2, B-1, C-4, D-3
    • D. A-3, B-1, C-4, D-2
      • Discuss
    • 4. Match the following:

      List I List II
      A. TV 1. 1 kHz
      B. Radio 2. 3 kHz
      C. Telephony 3. 9 kHz
      D. Telegraphy 4. 5 MHz


    • Options
    • A. A-4, B-1, C-2
    • B. A-4, B-3, C-2
    • C. A-2, B-1, C-3
    • D. A-1, B-2, C-3
      • Discuss
    • 5. Match the following:

      List I List II
      A. RT 1. A = D
      B. Rh 2. h12 = h21
      C. ST 3. AD - BC = 1
      D. Sh 4. h21 = - h21
      5. B = C
      6. ?h = 1


    • Options
    • A. A-3, B-4, C-1, D-6
    • B. A-3, B-2, C-5, D-4
    • C. A-5, B-4, C-1, D-2
    • D. A-5, B-4, C-1, D-6
      • Discuss
    • 6. When a material becomes a superconductor, its resistivity becomes

    • Options
    • A. very small
    • B. zero
    • C. about 10% of normal value
    • D. about 20% of normal value
      • Discuss
    • 7. In metals the thermal conductivity K and electrical conductivity ? are related as (K/?T) = L, L is known as

    • Options
    • A. Lattice constant
    • B. Lorentz number
    • C. Lanevin function
    • D. Larmor number
      • Discuss
    • 8. In metals, the average drift velocity of electron per unit field is called mobility.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. Silicon and germanium atoms combine orderly into array of atoms located in repetitive geometric pattern. This pattern is called

    • Options
    • A. crystal
    • B. covalent bond
    • C. molecule
    • D. valence bond
      • Discuss
    • 10. Dielectric constant of transformer oil is about

    • Options
    • A. 1
    • B. 4
    • C. 10
    • D. 20
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.