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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. One electron volt is equivalent to

    2. A.
    1.6 x 10-10 joule
    B.
    1.6 x 10-13 joule
    C.
    1.6 x 10-16 joule
    D.
    1.6 x 10-19 joule

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  2. Resistivity of electrical conductors is most affected by

    3. A.
    Pressure
    B.
    temperature
    C.
    composition
    D.
    ageing

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  3. Wiedemann-Franz law correlates

    4. A.
    electrical and thermal conductivities
    B.
    electron arrangement in shells
    C.
    temperature and photo electric emission
    D.
    all of the above

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  4. In bipolar transistors dc current gain is

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  5. Holes and electrons move in opposite directions.

    6. A.
    True
    B.
    False

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  6. The energy of one quantum of light equal to hf.

    7. A.
    True
    B.
    False

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  7. For most metals, Fermi level EF is less than

    8. A.
    0.1 eV
    B.
    2 eV
    C.
    5 eV
    D.
    10 eV

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  8. The spins in a ferrimagnetic material are

    9. A.
    all aligned parallel
    B.
    partially aligned antiparallel without exactly cancelling out sublattice magnetisation
    C.
    randomly oriented
    D.
    all aligned antiparallel such that the sublattice cancels out exactly

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  9. The permeability of soft iron can be increased by

    10. A.
    purifying it
    B.
    reducing carbon percentage
    C.
    alloying with cobalt
    D.
    increasing percentage

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  10. All of the following elements have three valence electrons EXCEPT

    11. A.
    boron
    B.
    indium
    C.
    gallium
    D.
    arsenic

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