logo

CuriousTab

CuriousTab

Discussion


Home Electronics and Communication Engineering Electronic Devices and Circuits Comments

  • Question
  • A silicon (PN) junction at a temperature of 20°C has a reverse saturation current of 10 pico Ampere. The reverse saturation current at 40°C for the same bias is approximately.


  • Options
  • A. 30 pA
  • B. 40 pA
  • C. 50 pA
  • D. 60 pA

  • Correct Answer
  • 40 pA 

    Explanation
    By increasing of temperature by 10°C, Io become double so by increasing temperature 20°C, Io become 4 time than initial value... and it is 40 PA.

    Electronic Devices and Circuits problems


    Search Results


    • 1. Recombination produces new electron-hole pairs

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. In an n channel JFET, the gate is

    • Options
    • A. n type
    • B. p type
    • C. either n or p
    • D. partially n & partially p
    • Discuss
    • 3. The number of doped regions in PIN diode is

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 1 or 2
    • Discuss
    • 4. Secondary emission is always decremental.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. A potential of 7 V is applied to a silicon diode. A resistance of 1 K ohm is also in series with the diode. The current is

    • Options
    • A. 7 mA
    • B. 6.3 mA
    • C. 0.7 mA
    • D. 0
    • Discuss
    • 6. Ferrite have

    • Options
    • A. low copper loss
    • B. low eddy current loss
    • C. low resistivity
    • D. higher specific gravity compared to iron
    • Discuss
    • 7. A particular green LED emits light of wavelength 5490, Å, the energy bandgap of the semiconductor material used there is .. h = 6.6 x 10-34 J sec.

    • Options
    • A. 2.26 eV
    • B. 1.98 eV
    • C. 1.17 eV
    • D. 0.74 eV
    • Discuss
    • 8. The normal operation of JFET is

    • Options
    • A. constant voltage region
    • B. constant current region
    • C. both constant voltage and constant current regions
    • D. either constant voltage or constant current region
    • Discuss
    • 9. In a degenerate n type semiconductor material, the Fermi level,

    • Options
    • A. is in valence band
    • B. is in conduction band
    • C. is at the centre in between valence and conduction bands
    • D. is very near valence band
    • Discuss
    • 10. The power dissipation in a transistor is the product of

    • Options
    • A. emitter current and emitter to base voltage
    • B. emitter current and collector to emitter voltage
    • C. collector current and collector to emitter voltage
    • D. none of the above
    • Discuss


    Comments

    There are no comments.

Enter a new Comment