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Home Electronics Field Effect Transistors (FET) Comments

  • Question
  • A MOSFET has how many terminals?


  • Options
  • A. 2 or 3
  • B. 3
  • C. 4
  • D. 3 or 4

  • Correct Answer
  • 3 or 4 


  • Field Effect Transistors (FET) problems


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    • 1. D-MOSFETs are sometimes used in series to construct a cascode high-frequency amplifier to overcome the loss of:

    • Options
    • A. low output impedance
    • B. capacitive reactance
    • C. high input impedance
    • D. inductive reactance
    • Discuss
    • 2. With a 30-volt VDD, and an 8-kilohm drain resistor, what is the E-MOSFET Q point voltage, with ID = 3 mA?

    • Options
    • A. 6 V
    • B. 10 V
    • C. 24 V
    • D. 30 V
    • Discuss
    • 3. The common-source JFET amplifier has:

    • Options
    • A. a very high input impedance and a relatively low voltage gain
    • B. a high input impedance and a very high voltage gain
    • C. a high input impedance and a voltage gain less than 1
    • D. no voltage gain
    • Discuss
    • 4. How will a D-MOSFET input impedance change with signal frequency?

    • Options
    • A. As frequency increases input impedance increases.
    • B. As frequency increases input impedance is constant.
    • C. As frequency decreases input impedance increases.
    • D. As frequency decreases input impedance is constant.
    • Discuss
    • 5. With a JFET, a ratio of output current change against an input voltage change is called:

    • Options
    • A. transconductance
    • B. siemens
    • C. resistivity
    • D. gain
    • Discuss
    • 6. The transconductance curve of a JFET is a graph of:

    • Options
    • A. IS versus VDS
    • B. IC versus VCE
    • C. ID versus VGS
    • D. ID × RDS
    • Discuss
    • 7. When not in use, MOSFET pins are kept at the same potential through the use of:

    • Options
    • A. shipping foil
    • B. nonconductive foam
    • C. conductive foam
    • D. a wrist strap
    • Discuss
    • 8. Using voltage-divider biasing, what is the voltage at the gate VGS?


    • Options
    • A. 5.2 V
    • B. 4.2 V
    • C. 3.2 V
    • D. 2.2 V
    • Discuss
    • 9. The type of bias most often used with E-MOSFET circuits is:

    • Options
    • A. constant current
    • B. drain-feedback
    • C. voltage-divider
    • D. zero biasing
    • Discuss
    • 10. When VGS = 0 V, a JFET is:

    • Options
    • A. saturated
    • B. an analog device
    • C. an open switch
    • D. cut off
    • Discuss


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