1. 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 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
2. The output characteristics of a JFET closely resemble the output characteristics of a ___________ valve A. pentode B. tetrode C. triode D. diode 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
3. The constant-current region of a JFET lies between A. cut off and saturation B. cut off and pinch-off C. o and IDSS D. pinch-off and breakdown 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
4. 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 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
5. 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 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
6. If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ___________ A. is decreased B. is increased C. remains the same D. none of the above 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
7. 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 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
8. If the cross-sectional area of the channel in n-channel JEFT increases, the drain current ___________ A. is increased B. is decreased C. remains the same D. none of the above 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
9. 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 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
10. In a certain CS JFET amplifier, RD = 1 kΩ , RS = 560 Ω , VDD = 10 V and gm = 4500 µS. If the source resistor is completely bypassed, the voltage gain is ___________. A. 450 B. 45 C. 2.52 D. 4.5 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