Electronics - Field Effect Transistors (FET)

Exercise :: Field Effect Transistors (FET) - General Questions

26. 

The transconductance curve of a JFET is a graph of:

A. IS versus VDS
B. IC versus VCE
C. ID versus VGS
D. ID × RDS

Answer: Option C

Explanation:

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27. 

The common-source JFET amplifier has:

A. a very high input impedance and a relatively low voltage gain
B. a high input impedance and a very high voltage gain
C. a high input impedance and a voltage gain less than 1
D. no voltage gain

Answer: Option A

Explanation:

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28. 

Using voltage-divider biasing, what is the voltage at the gate VGS?

mcq13_1010_1.gif

A. 5.2 V
B. 4.2 V
C. 3.2 V
D. 2.2 V

Answer: Option A

Explanation:

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29. 

The overall input capacitance of a dual-gate D-MOSFET is lower because the devices are usually connected:

A. in parallel
B. with separate insulation
C. with separate inputs
D. in series

Answer: Option D

Explanation:

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30. 

What is the transconductance of an FET when ID = 1 mA and VGS = 1 V?

A. 1 kS
B. 1 mS
C. 1 k
D. 1 m

Answer: Option B

Explanation:

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