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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. The amount of photoelectric emission current depends on

    2. A.

     Frequency of incident radiation
    B.

     Intensity of incident radiation
    C.

     Both frequency and intensity of incident radiation
    D.

     None of the above

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  2. The sensitivity of human eyes is maximum at

    3. A.

     White portion of spectrum
    B.

     Green portion of spectrum
    C.

     Red portion of spectrum
    D.

     Violet portion of spectrum

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  3. The sensitivity of human eyes is maximum at

    4. A.

     White portion of spectrum
    B.

     Green portion of spectrum
    C.

     Red portion of spectrum
    D.

     Violet portion of spectrum

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  4. Which of the following could be the maximum current rating of junction diode by 126?

    5. A.

     1 A
    B.

     10 A
    C.

     20 A
    D.

     100 A

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  5. Piezoelectric quartz crystal resonators find application where

    6. A.

     Signal amplification is required
    B.

     Rectification of the signal is required
    C.

     Signal frequency control is required
    D.

     Modulation of signal is required

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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. Forbidden energy gap in germanium at 0 K is about

    8. A.

     10 eV
    B.

     5 eV
    C.

     2 eV
    D.

     0.78 eV

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  8. 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.

    9. 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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  9. In a semiconductor diode, the barrier offers opposition to

    10. A.

     Holes in P-region only
    B.

     Free electrons in N-region only
    C.

     Majority carriers in both regions
    D.

     Majority as well as minority carriers in both regions

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  10. As compared to bipolar junction transistor, a FET

    11. A.

     Is less noisy
    B.

     Has better thermal stability
    C.

     Has higher input resistance
    D.

     All of the above

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