FET(Field Effect Transistors) MCQ Questions & Answers

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

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2.
The output characteristics of a JFET closely resemble the output characteristics of a ___________ valve

A. pentode

B. tetrode

C. triode

D. diode

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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

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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

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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

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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

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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

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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

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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

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10.
In a certain CS JFET amplifier, R_D = 1 kΩ , R_S = 560 Ω , V_DD = 10 V and g_m = 4500 µS. If the source resistor is completely bypassed, the voltage gain is ___________.

A. 450

B. 45

C. 2.52

D. 4.5

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FET(Field Effect Transistors) MCQ Questions & Answers | Electrical Engineering

1. The gate voltage in a JFET at which drain current becomes zero is called ___________ voltage

Answer & Solution

2. The output characteristics of a JFET closely resemble the output characteristics of a ___________ valve

Answer & Solution

3. The constant-current region of a JFET lies between

Answer & Solution

4. A JFET has high input impedance because ___________

Answer & Solution

5. A MOSFET differs from a JFET mainly because ___________

Answer & Solution

6. If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ___________

Answer & Solution

7. If the gate of a JFET is made less negative, the width of the conducting channel ___________

Answer & Solution

8. If the cross-sectional area of the channel in n-channel JEFT increases, the drain current ___________

Answer & Solution

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 ___________

Answer & Solution

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 ___________.

Answer & Solution

1.
The gate voltage in a JFET at which drain current becomes zero is called ___________ voltage

2.
The output characteristics of a JFET closely resemble the output characteristics of a ___________ valve

3.
The constant-current region of a JFET lies between

4.
A JFET has high input impedance because ___________

5.
A MOSFET differs from a JFET mainly because ___________

6.
If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ___________

7.
If the gate of a JFET is made less negative, the width of the conducting channel ___________

8.
If the cross-sectional area of the channel in n-channel JEFT increases, the drain current ___________

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 ___________

10.
In a certain CS JFET amplifier, R_D = 1 kΩ , R_S = 560 Ω , V_DD = 10 V and g_m = 4500 µS. If the source resistor is completely bypassed, the voltage gain is ___________.