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EEE :: FET(Field Effect Transistors)

  1. In a parallel LC circuit, if the input signal frequency is increased above resonant frequency then ___________

  2. A.

     XL increases and XC decreases

    B.

     XL decreases and XC increases

    C.

     Both XL and XC increase

    D.

     Both XL and XC decrease


  3. At the base emitter junctions of a transistor, one finds ___________

  4. A.

     a reverse bias

    B.

     a wide depletion layer

    C.

     low resistance

    D.

     none of the above


  5. The current IB is ___________

  6. A.

     electron current

    B.

     hole current

    C.

     donor ion current

    D.

     acceptor ion current


  7. At parallel resonance, the ratio L/C is ___________

  8. A.

     Very large

    B.

     Zero

    C.

     Small

    D.

     None of the above


  9. The Q of a tuned circuit refers to the property of ___________

  10. A.

     Sensitivity

    B.

     Fidelity

    C.

     Selectivity

    D.

     None of the above


  11. The circuit that provides the best stabilization of operating point is ___________

  12. A.

     Base resistor bias

    B.

     Collector feedback bias

    C.

     Potential divider bias

    D.

     None of the above


  13. Operating point represents ___________

  14. A.

     Values of IC and VCE when signal is applied

    B.

     The magnitude of signal

    C.

     Zero signal values of IC and VCE

    D.

     None of the above


  15. The point of intersection of d.c. and a.c. load lines represents ___________

  16. A.

     Operating point

    B.

     Current gain

    C.

     Voltage gain

    D.

     None of the above


  17. For faithful amplification by a transistor circuit, the value of VCE should ___________ for silicon transistor

  18. A.

     Not fall below 1 V

    B.

     Be zero

    C.

     Be 0.2 V

    D.

     None of the above


  19. At series resonance, the phase angle between applied voltage and circuit is ___________

  20. A.

     90°

    B.

     180°

    C.

     0°

    D.

     None of the above