Explore topic-wise MCQs in Electronic Devices Circuits.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

What will be the value of trans conductance if two Identical FETs are connected in parallel?

A. Doubles
B. Reduces to half
C. 0
D. Infinite
Answer» B. Reduces to half
Discussion
2.

What will be the value of rd, if two identical FETs are connected in parallel?

A. Doubles
B. Reduces to half
C. 0
D. Infinite
Answer» C. 0
Discussion
3.

What is the value of resultant gm if two non identical FETs are connected in parallel?

A. (µ1 rd1 + µ2 rd2)/ (rd1+rd2)
B. (µ1 rd2 + µ2 rd1)/ (rd1+rd2)
C. 0
D. µ1 rd1+ µ2 rd2
Answer» C. 0
Discussion
4.

A FET is biased at ID = IDSS/4, at this point the value of trans conductance is __________________ (ID=10mA, Vp=-5V).

A. 1mA/V
B. 2mA/V
C. 3mA/V
D. 4mA/V
Answer» C. 3mA/V
Discussion
5.

For a p-channel FET, the current ID at Vgs = 2V and Vds = 5V and Vgs = 3V was found to be 2mA, what will be the value of ID at Vgs = 0V and Vds = 5V?

A. 0A
B. 2mA
C. Lesser than 0A
D. Greater than 2mA
Answer» B. 2mA
Discussion
6.

For an n-channel FET, the current v at Vgs=-2V and Vds=5V was found to be 2mA, what will be the value of ID at Vgs=0V and Vds=5V?

A. 0A
B. 2mA
C. Lesser than 0A
D. Greater than 2mA
Answer» E.
Discussion
7.

A JFET has ID=10mA, IDSS=1A, Vp=-1v, what is the value of Vgs?

A. -0.9V
B. 1V
C. -1V
D. 0.5V
Answer» B. 1V
Discussion
8.

If a JFET with length L=10µm, a=2µm, W=8µm, Vp=-4V.What is the value of rds at Vgs = 0V?

A. 2KΩ
B. 5.2KΩ
C. 10KΩ
D. 9.8KΩ
Answer» E.
Discussion
9.

For low value of VDS, the JFET behaves like a __________

A. Voltage Variable Resistor
B. Constant Voltage Device
C. Amplifier
D. Switch
Answer» B. Constant Voltage Device
Discussion
10.

WHAT_WILL_BE_THE_VALUE_OF_RD,_IF_TWO_IDENTICAL_FETS_ARE_CONNECTED_IN_PARALLEL??$

A. Doubles
B. Reduces to half
C. 0
D. Infinite
Answer» C. 0
Discussion
11.

What_will_be_the_value_of_trans_conductance_if_two_Identical_FETs_are_connected_in_parallel?$

A. Doubles
B. Reduces to half
C. 0
D. Infinite
Answer» B. Reduces to half
Discussion
12.

What is the value of resultant gm if two non identical FETs are connected in parallel?

A. (µ<sub>1</sub> r<sub>d1</sub> + µ<sub>2</sub> r<sub>d2</sub>)/ (r<sub>d1</sub>+r<sub>d2</sub>)
B. (µ<sub>1</sub> r<sub>d2</sub> + µ<sub>2</sub> r<sub>d1</sub>)/ (r<sub>d1</sub>+r<sub>d2</sub>)
C. 0
D. µ<sub>1</sub> r<sub>d1</sub>+ µ<sub>2</sub> r<sub>d2</sub>
Answer» C. 0
Discussion
13.

A FET is biased at ID = IDSS/4, at this point the value of trans conductance is __________________ (ID=10mA, Vp=-5V).

A. 1mA/V
B. 2mA/V
C. 3mA/V
D. 4mA/V
Answer» C. 3mA/V
Discussion
14.

For a p-channel FET, the current ID at Vgs = 2V and Vds = 5V and Vgs = 3V was found to be 2mA, what will be the value of ID at Vgs = 0V and Vds = 5V?

A. 0A
B. 2mA
C. Lesser than 0A
D. Greater than 2mA
Answer» B. 2mA
Discussion
15.

For an n-channel FET, the current v at Vgs=-2V and Vds=5V was found to be 2mA, what will be the value of ID at Vgs=0V and Vds=5V?

A. 0A
B. 2mA
C. Lesser than 0A
D. Greater than 2mA
Answer» E.
Discussion
16.

Where does the transfer curve lie for a p- channel FET?

A. First quadrant
B. Second quadrant
C. Third quadrant
D. Fourth quadrant
Answer» B. Second quadrant
Discussion
17.

A JFET has ID=10mA, IDSS=1A, Vp=-1v, what is the value of Vgs?

A. -0.9V
B. 1V
C. -1V
D. 0.5V
Answer» B. 1V
Discussion
18.

If a JFET with length L=10µm, a=2µm, W=8µm, Vp=-4V.What is the value of rds at Vgs = 0V?$

A. 2KΩ
B. 5.2KΩ
C. 10KΩ
D. 9.8KΩ
Answer» E.
Discussion
19.

For low value of VDS, the JFET behaves like a __________

A. Voltage Variable Resistor
B. Constant Voltage Device
C. Amplifier
D. Switch
Answer» B. Constant Voltage Device
Discussion