1. A JFET is also called____________ transistor?
A. unipolar
B. bipolar
C. unijunction
D. none of the above
✅ The correct answer is option A.
Field Effect Transistors – FET MCQs
2. In a p-channel JFET, the charge carriers are _____________?
A. electrons
B. holes
C. both electrons and holes
D. none of the above
✅ The correct answer is option B.
3. A MOSFET differs from a JFET mainly because _________________?
A. of power rating
B. the MOSFET has two gates
C. the JFET has a pn junction
D. none of the above
✅ The correct answer is option C.
4. A JFET has three terminals, namely________________?
A. cathode, anode, grid
B. emitter, base, collector
C. source, gate, drain
D. none of the above
✅ The correct answer is option C.
5. 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
✅ The correct answer is option B.
6. 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
✅ The correct answer is option C.
7. 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
✅ The correct answer is option D.
8. The gate of a JFET is ___________ biased?
A. reverse
B. forward
C. reverse as well as forward
D. none of the above
✅ The correct answer is option A.
9. A MOSFET can be operated with________________?
A. negative gate voltage only
B. positive gate voltage only
C. positive as well as negative gate voltage
D. none of the above
✅ The correct answer is option C.
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
✅ The correct answer is option C.