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 ________________?

Related Mcqs:

1. 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

2. 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

3. n a common-source JFET amplifier, the output voltage is _____________?

   A. 180o out of phase with the input
   B. in phase with the input
   C. 90o out of phase with the input
   D. taken at the source

4. A CS JFET amplifier has a load resistance of 10 kO , RD= 820O . If gm= 5mS and Vin= 500 mV, the output signal voltage is__________________?

   A. 2.05 V
   B. 25 V
   C. 0.5 V
   D. 1.89 V

5. A certain JFET data sheet gives VGS(off) = -4 V. The pinch-off voltage Vp is _____________?

   A. +4 V
   B. -4 V
   C. dependent on VGS
   D. data insufficient

6. 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

7. 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

8. 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

9. A JFET has ____________ power gain?

   A. small
   B. very high
   C. very small
   D. none of the above

10. 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