21. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
22. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
23. For VGS = 0 V, the drain current becomes constant when VDS exceeds A. cut off B. VDD C. VP D. o V Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
24. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
25. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
26. ___________ has the lowest noise-level A. triode B. ordinary trnsistor C. tetrode D. JFET Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
27. Which of the following devices has the highest input impedance? A. JFET B. MOSFET C. Crystal diode D. ordinary transistor Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
28. The transconductance of a JFET ranges from ___________ A. 100 to 500 mA/V B. 500 to 1000 mA/V C. 0.5 to 30 mA/V D. above 1000 mA/V Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
29. In a p-channel JFET, the charge carriers are ___________ A. electrons B. holes C. both electrons and holes D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
30. The pinch-off voltage of a JFET is about ___________ A. 5 V B. 0.6 V C. 15 V D. 25 V Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board