Related Mcqs:

1. 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 _____________?

   A. 20 mA
   B. 0 mA
   C. 40 mA
   D. 10 mA

2. The pinch-off voltage in a JFET is analogous to _____________ voltage in a vacuum tube?

   A. anode
   B. cathode
   C. grid cut off
   D. none of the above

3. In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ______________?

   A. almost touch each other
   B. have large gap
   C. have moderate gap
   D. none of the above

4. A certain p-channel E-MOSFET has VGS(th) = -2V. If VGS= 0V, the drain current is ____________?

   A. 0 mA
   B. ID(on)
   C. maximum
   D. IDSS

5. When drain voltage equals the pinch-off-voltage, then drain current ___________ with the increase in drain voltage?

   A. decreases
   B. increases
   C. remains constant
   D. none of the above

6. The pinch-off voltage of a JFET is about _______________?

   A. 5 V
   B. 0.6 V
   C. 15 V
   D. 25 V

7. In a certain common-source D-MOSFET amplifier, Vds =3.2 V r.m. and Vgs = 280 mV r.m.s. The voltage gain is_______________?

   A. 1
   B. 11.4
   C. 8.75
   D. 3.2

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

   A. the voltage gain will increase
   B. the transconductance will increase
   C. the voltage gain will decrease
   D. the Q-point will shift

9. In a certain CS JFET amplifier, RD= 1kO , RS= 560 O , VDD=10V and gm= 4500 µS. If the source resistor is completely bypassed, the voltage gain is ________________?

   A. 450
   B. 45
   C. 2.52
   D. 4.5

10. The gate voltage in a JFET at which drain current becomes zero is called ______________ voltage?

    A. saturation
    B. pinch-off
    C. active
    D. cut-off