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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. In a photo emissive device and emission efficiency is increased by

    2. A.
    coating the cathode ray by an active materials
    B.
    coating the cathode by an insulating material
    C.
    heating the cathode
    D.
    cooling the anode

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  2. Materials in order of decreasing electrical conductivity are

    3. A.
    aluminium, silver, gold, copper
    B.
    gold, silver, copper, aluminium
    C.
    copper, silver, gold, aluminium
    D.
    silver, copper, gold, aluminium

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  3. Transconductance characteristics of JFET depict the relation between

    4. A.
    ID and VGS for different value of VDS
    B.
    ID and VDS for different value of VGS
    C.
    VGS and VDS for different values of ID
    D.
    VDS and ID for different values of VGS

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  4. The resistivity of intrinsic semiconductor material is about

    5. A.
    105 ohm-m
    B.
    103 ohm-m
    C.
    100 ohm-m
    D.
    1 ohm-m

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  5. Which of the following exhibits negative resistance in a portion of its characteristics?

    6. A.
    Tunnel diode
    B.
    Zener diode
    C.
    JFET
    D.
    MOSFET and tunnel diode

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  6. The emission of light is LED due to

    7. A.
    emission of holes
    B.
    emission of electrons
    C.
    generation of electromagnetic radiations
    D.
    conversion of heat energy into illumination

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  7. For bipolar transistor

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  8. The sum of two or more arbitrary sinusoidal is

    9. A.
    always periodic
    B.
    periodic under certain conditions
    C.
    never periodic
    D.
    periodic only if all the sinusoidals are identical in frequency and phase

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  9. Which of the following is used as a passive component in electronic circuits?

    10. A.
    Tunnel diode
    B.
    Capacitor
    C.
    Transistor
    D.
    Vacuum tube

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