Menu
Home / ECE / Electronic Devices and Circuits :: Section 11

ECE :: Electronic Devices and Circuits

Electronic Devices and Circuits - Section 1
Electronic Devices and Circuits - Section 2
Electronic Devices and Circuits - Section 3
Electronic Devices and Circuits - Section 4
Electronic Devices and Circuits - Section 5
Electronic Devices and Circuits - Section 6
Electronic Devices and Circuits - Section 7
Electronic Devices and Circuits - Section 8
Electronic Devices and Circuits - Section 9
Electronic Devices and Circuits - Section 10
Electronic Devices and Circuits - Section 11
Electronic Devices and Circuits - Section 12
Electronic Devices and Circuits - Section 13
Electronic Devices and Circuits - Section 14
Electronic Devices and Circuits - Section 15
Electronic Devices and Circuits - Section 16
Electronic Devices and Circuits - section-17
Electronic Devices and Circuits - Section-18

  1. The current due to thermionic emission is given by Richardson Dushman equation.

    2. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. The thermionic emission current is given by

    3. A.
    Fermi-Dirac distribution
    B.
    Maxwell's equation
    C.
    Richardson Dushman equation
    D.
    Langmuir Child law

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. In forward active region, the operation of a BJT

    4. A.
    both junctions are forward biased
    B.
    both junctions are reverse biased
    C.
    emitter base junction is forward biased and base collector junction is reverse biased
    D.
    emitter base junction is reverse biased and base collector junction is reverse biased

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. The conductivity of a semiconductor crystal due to any current carrier is not proportional to

    5. A.
    mobility of the carrier
    B.
    effective density of states in the conduction band
    C.
    electronic charge
    D.
    surface states in the semiconductor

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. A P-N junction diode dynamic conductance is directly proportional to

    6. A.
    the applied voltage
    B.
    the temperature
    C.
    its current
    D.
    thermal voltage

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. The Ni-Zn ferrites are used for audio and TV transformers is that

    7. A.
    they have large saturation magnetisation
    B.
    they are easy to fabricate by rolling
    C.
    they are free from pores and voids
    D.
    they have high electro-resistivity

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. Hall's effect can be used to measure

    8. A.
    magnetic field intensity
    B.
    average number of holes
    C.
    carriers concentration
    D.
    electrostatic field intensity

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. For insulators the energy gap is of the order of

    9. A.
    0.1 eV
    B.
    0.7 eV
    C.
    1.1 eV to 1.2 eV
    D.
    5 to 15 eV

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. When electronic emission occurs due to bombardment of high velocity electrons on a metal surface, it is called secondary emission.

    10. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. The reverse saturation current depends on the reverse bias.

    11. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers