Quiz  /  FET(Field Effect Transistors) Gate & PSU MCQ Questions With...

  • 1. 
    FET is a voltage controlled device.

  • True
  • False

  • 2. 
    If the reverse bias on the gate of a JFET is increased, then width of the conducting channel …………..

  • is increased
  • is decreased
  • remains the same
  • none of the above

  • 3. 
    JFET is bipolar device

  • True
  • False

  • 4. 
    A JFET is also called …………… transistor

  • bipolar
  • unipolar
  • unijunction
  • none of the above

  • 5. 
    Which of the following statement is true about FET?

  • It has high output impedance
  • It has high input impedance
  • It has low input impedance
  • It does not offer any resistance

  • 6. 
    A Field Effect Transistor FET............

  • is a POWER operated device
  • is a VOLTAGE operated device
  • is a CURRENT operated device

  • 7. 
    Amplifiers designed to handle AC signals are called....

  • large signals amplifiers
  • small signals amplifiers
  • thick signals amplifiers
  • thin signals amplifiers

  • 8. 
    With a JFET, a ratio of output current change against an input voltage change is called as ………..

  • resistivity
  • gain
  • siemens
  • transconductance

  • 9. 
    What is the biasing at Gate-Source junction of JFET?

  • Forward biased
  • Reverse biased

  • 10. 
    Before connecting a FET in the circuit

  • Its source and drain terminals are interchangeable
  • It source and drain terminals are not interchangeable
  • Its drain terminal is marked
  • None of these

  • 11. 
    MOSFET uses the electric field of

  • Gate capacitance to control the channel current
  • Barrier potential of PN junction to control the channelcurrent
  • Both a and b
  • none of these

  • 12. 
    A JFET has three terminals, namely

  • cathode,anode,grid
  • emitter, base, collector
  • source, gate, drain
  • none of the above

  • 13. 
    A FET as a three terminal namely , source ,drain and

  • grid
  • gate
  • ground
  • substrate

  • 14. 
    The two important advantages of a JFET are …………..

  • inexpensive and high output impedance
  • low input impedance and high output impedance
  • high input impedance and square-law property
  • none of the above

  • 15. 
    …………. has the lowest noise-level

  • tetrode
  • ordinary trnsistor
  • JFET
  • triode

  • 16. 
    The input impedance of a JFET is …………. that of an ordinary transistor

  • equal to
  • more than
  • less than
  • none of the above

  • 17. 
    The input impedance of a FET is of the order of

  • 10^20 ohms
  • Hundreds of mega ohms
  • Hundred ohms
  • a few ohms

  • 18. 
    The gate voltage in a JFET at which drain current becomes zero is called ……….. voltage

  • cut-off
  • active
  • saturation
  • pinch-off

  • 19. 
    The electrons flow through a p-channel JFET from ……….. to …………..

  • from drain to source
  • from drain to gate
  • from source to gate
  • from source to drain

  • 20. 
    In a p-channel JFET, the charge carriers are …………..

  • electrons
  • holes
  • both electrons and holes
  • none of the above

  • 21. 
    What is pinch off region?

  • The minimum voltage required to turn on the FET
  • The maximum voltage a FET can withstand
  • The drain current remains constant at its maximum

  • 22. 
    What are the two basic types of junction field-effect transistors?

  • MOSFET and GaAsFET.
  • N-channel and P-channel.
  • Silicon FET and germanium FET.
  • High power and low power.

  • 23. 
    A JFET has ……….. power gain

  • small
  • very high
  • very small
  • none of the above

  • 24. 
    What happen when VDS keep increasing after reach pinch off region

  • ID decreasing rapidly
  • ID keeps in constant value
  • ID increasing rapidly
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