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Home ‣ Electronics and Communication Engineering ‣ Analog Electronics See What Others Are Saying!
  • Question

  • In a CE amplifier the input impedance is equal to the ratio of


  • Options
  • A. ac base voltage to ac base current
  • B. ac base voltage to ac emitter current
  • C. ac emitter voltage to ac collector current
  • D. ac collector voltage to ac collector current

  • Correct Answer
  • ac base voltage to ac base current 

    Explanation
    Input is applied to base with emitter grounded. The input impedance is the ratio of ac base voltage to ac base current.

    More questions

    • 1. The characteristic impedance of a cable is about

    • Options
    • A. 300 ?
    • B. 50 ?
    • C. 5 ?
    • D. 2 ?
      • Discuss
    • 2. A copper atom is neutral. Its core has a net charge of

    • Options
    • A. 0
    • B. + 1
    • C. - 1
    • D. + 2
      • Discuss
    • 3. The characteristics of which device has peak point and valley point

    • Options
    • A. SCR
    • B. PUT
    • C. SCS
    • D. Shockley diode
      • Discuss
    • 4. Schrodinger wave equation is partial differential equation.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The output frequency of a cycloconverter can be changed by changing the firing angle.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. Most of the memory chips in static RAM

    • Options
    • A. do not require any supply
    • B. need 2 V supply
    • C. need 5 V supply
    • D. need 12 V supply
      • Discuss
    • 7. In crystalline solids, atoms are stacked in a regular manner.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The classes of solid dielectrics are

    • Options
    • A. A, B, C, D, E, F, H
    • B. A E B F H C D
    • C. Y A E B F H C
    • D. A E B F H C
      • Discuss
    • 9. The unit for mmf is

    • Options
    • A. A
    • B. Wb
    • C. T
    • D. V
      • Discuss
    • 10. In a single phase full wave regulator, the firing angles in the positive and negative half cycles are generally

    • Options
    • A. equal
    • B. different
    • C. equal or different
    • D. different but sometimes equal
      • Discuss

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