11. 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
✅ The correct answer is option C.
Field Effect Transistors – FET MCQs
12. For VGS = 0 V, the drain current becomes constant when VDS exceeds ________________?
A. cut off
B. VDD
C. VP
D. V
✅ The correct answer is option C.
13. A n-channel D-MOSFET with a positive VGS is operating in _______________?
A. the depletion-mode
B. the enhancement-mode
C. cut off
D. saturation
✅ The correct answer is option B.
14. A JFET is similar in operation to ___________ valve?
A. diode
B. pentode
C. triode
D. tetrode
✅ The correct answer is option B.
15. 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
✅ The correct answer is option A.
16. If load resistance in the above question (Q.49) is removed, the output voltage will_____________?
A. increase
B. decrease
C. stay the same
D. be zero
✅ The correct answer is option A.
17. In a FET, there are _____________pn junctions at the sides?
A. three
B. four
C. five
D. two
✅ The correct answer is option D.