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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. For a NPN bipolar transistor, what is the main stream of current in the base region?

    2. A.
    Drift of holes
    B.
    Diffusion of holes
    C.
    Drift of electrons
    D.
    Diffusion of electrons

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  2. Assertion (A): A VMOS can handle much larger current than other field effect transistors.

    Reason (R): In a VMOS the conducting channel is very narrow.

    3. 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 a correct explanation of A
    C.
    A is true but R is false
    D.
    A is false but R is true

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  3. In monolithic ICs, all the components are fabricated by

    4. A.
    diffusion process
    B.
    oxidation
    C.
    evaporation
    D.
    none

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  4. Which one of the following is not a characteristic of a ferroelectric material?

    5. A.
    High dielectric constant
    B.
    No hysteresis
    C.
    Ferroelectric characteristic only above the curie point
    D.
    Electric dipole moment

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  5. In case of photo conductor for germanium when forbidden energy gap is 0.72 eV, the critical wavelength for intrinsic excitation will be

    6. A.
    1.43 m
    B.
    1.43 mm
    C.
    1.73 mm
    D.
    1.73 x 1012 m

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  6. In the sale of diamonds the unit of weight is carat. One carat is equal to

    7. A.
    100 mg
    B.
    150 mg
    C.
    200 mg
    D.
    500 mg

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  7. R.M.S. value of the waveform shown will be

    8. A.
    3.53 V
    B.
    1 V
    C.
    7.07 V
    D.
    8.56 V

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  8. The effect of current shunt feedback in an amplifier is to

    9. A.
    increase the I/P resistance and decrease the O/P resistance
    B.
    increase both I/P and O/P resistance
    C.
    decrease both I/P and O/P resistance
    D.
    decrease the I/P resistance and increase O/P resistance

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  9. Assertion (A): A JFET can be used as a current source.

    Reason (R): In beyond pinch off region the current in JFET is nearly constant.

    10. 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 a correct explanation of A
    C.
    A is true but R is false
    D.
    A is false but R is true

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  10. Permalloy is

    11. A.
    a variety of stainless steel
    B.
    a polymer
    C.
    a conon-ferrous alloy used in aircraft industry
    D.
    a nickel an iron alloy having high permeability

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