Related Mcqs:

1. A JFET is also called____________ transistor?

   A. unipolar
   B. bipolar
   C. unijunction
   D. none of the above

2. 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

3. 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

4. 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

5. In a p-channel JFET, the charge carriers are _____________?

   A. electrons
   B. holes
   C. both electrons and holes
   D. none of the above

6. 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

7. At cut-off, the JFET channel is _____________?

   A. at its widest point
   B. completely closed by the depletion region
   C. extremely narrow
   D. reverse baised

8. A JFET has high input impedance because _________________?

   A. it is made of semiconductor material
   B. input is reverse biased
   C. of impurity atoms
   D. none of the above

9. If the gate of a JFET is made less negative, the width of the conducting channel__________________?

   A. remains the same
   B. is decreased
   C. is increased
   D. none of the above

10. The constant-current region of a JFET lies between______________?

    A. cut off and saturation
    B. cut off and pinch-off
    a. and IDSS
    C. pinch-off and breakdown