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FET(Field Effect Transistors) - section-1
  1. The two important advantages of a JFET are ___________

    2. A.

     high input impedance and square-law property
    B.

     inexpensive and high output impedance
    C.

     low input impedance and high output impedance
    D.

     none of the above

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  2. In a JFET, IDSS is known as ___________

    3. A.

     drain to source current
    B.

     drain to source current with gate shorted
    C.

     drain to source current with gate open
    D.

     none of the above

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  3. A MOSFET is sometimes called ___________ JFET

    4. A.

     many gate
    B.

     open gate
    C.

     insulated gate
    D.

     shorted gate

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  4. In a common source JFET amplifier, the output voltage is ___________

    5. A.

     in phase with the input
    B.

     taken at the source

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  5. A CS JFET amplifier has a load resistance of 10 kΩ , RD= 820° . If gm= 5mS and Vin= 500 mV, the output signal voltage is ___________

    6. A.

     2.05 V
    B.

     25 V
    C.

     0.5 V
    D.

     1.89 V

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  6. In a FET, there are ___________ pn junctions at the sides

    7. A.

     three
    B.

     four
    C.

     five
    D.

     two

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  7. The input impedance of a MOSFET is of the order of ___________

    8. A.

     O
    B.

     a few hundred O
    C.

     kΩ
    D.

     several MO

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  8. A certain common source JFET has a voltage gain of 10. If the source bypass capacitor is removed, ___________

    9. A.

     the voltage gain will increase
    B.

     the transconductance will increase
    C.

     the voltage gain will decrease
    D.

     the Q-point will shift

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  9. A certain D-MOSFET is biased at VGS = 0 V. Its data sheet specifies IDSS = 20mA and VGS(off) = -5 V. The value of the drain current is ___________

    10. A.

     20 mA
    B.

     0 mA
    C.

     40 mA
    D.

     10 mA

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  10. The gate of a JFET is ___________ biased

    11. A.

     reverse
    B.

     forward
    C.

     reverse as well as forward
    D.

     none of the above

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