05_DIAG_FET AND AMPLIFIER

Question 1

What does FET stand for?

Answer 1

Field Effect Transistor

Question 2

True or False: A Field Effect Transistor controls current using voltage.

Answer 2

True

Question 3

What are the three terminals of a Field Effect Transistor?

Answer 3

Source, Drain, and Gate

Question 4

Fill in the blank: The main function of a FET is to act as a _______.

Answer 4

voltage-controlled resistor

Question 5

What type of semiconductor material is commonly used in FETs?

Answer 5

Silicon

Question 6

What is the primary advantage of using FETs over BJTs?

Answer 6

Higher input impedance

Question 7

Multiple Choice: Which of the following is NOT a type of FET? A) MOSFET B) JFET C) BJT D) MESFET

Answer 7

C) BJT

Question 8

What does MOSFET stand for?

Answer 8

Metal-Oxide-Semiconductor Field-Effect Transistor

Question 9

True or False: The gate of a MOSFET is insulated from the channel.

Answer 9

True

Question 10

What is the purpose of the gate terminal in a FET?

Answer 10

To control the flow of current between the source and drain

Question 11

Fill in the blank: In a JFET, current flows through a _______.

Answer 11

semiconductor channel

Question 12

What is the primary function of an amplifier?

Answer 12

To increase the amplitude of a signal

Question 13

Multiple Choice: Which configuration is commonly used for FET amplifiers? A) Common Emitter B) Common Source C) Common Collector D) Common Drain

Answer 13

B) Common Source

Question 14

What does the term ‘gain’ refer to in an amplifier?

Answer 14

The ratio of output signal to input signal

Question 15

True or False: FET amplifiers can provide both voltage gain and current gain.

Answer 15

False

Question 16

What is the typical input impedance of a FET amplifier?

Answer 16

Very high, often in the megaohm range

Question 17

Fill in the blank: FETs are often used in _______ applications.

Answer 17

low-noise

Question 18

What is a common application of FET amplifiers?

Answer 18

Audio amplification

Question 19

Multiple Choice: What factor primarily affects the frequency response of a FET amplifier? A) Load Resistance B) Gate Capacitance C) Drain Voltage D) Source Current

Answer 19

B) Gate Capacitance

Question 20

True or False: The output of a FET amplifier is always in phase with the input.

Answer 20

False

Question 21

What is meant by ‘linear operation’ in the context of FET amplifiers?

Answer 21

The output signal is a linear function of the input signal.

Question 22

Fill in the blank: The maximum output voltage swing of a FET amplifier is limited by the _______.

Answer 22

supply voltage

Question 23

What is the role of biasing in FET amplifiers?

Answer 23

To set the operating point of the transistor.

Question 24

Multiple Choice: Which parameter is critical for determining the stability of a FET amplifier? A) Bandwidth B) Power Supply C) Feedback D) Temperature

Answer 24

C) Feedback

Question 25

True or False: FET amplifiers can operate in both analog and digital circuits.

Answer 25

True

Question 26

What does the term 'cut-off' refer to in FET operation?

Answer 26

The state where the FET is turned off and no current flows.

Question 27

Fill in the blank: A FET amplifier's _______ can be affected by the load connected to its output.

Answer 27

gain

Question 28

What is the significance of the transconductance parameter in a FET?

Answer 28

It measures the efficiency of the gate voltage to control the drain current.

Question 29

Multiple Choice: Which of the following is a disadvantage of using FETs? A) Low input impedance B) Limited frequency response C) High power consumption D) Complex biasing requirements

Answer 29

B) Limited frequency response

Question 30

True or False: FETs can be used for switching applications.

Answer 30

True

Question 31

What is the relationship between gate voltage and drain current in a FET?

Answer 31

Drain current increases with an increase in gate voltage until saturation.

Question 32

Fill in the blank: The main difference between a JFET and a MOSFET is the presence of a _______ in MOSFETs.

Answer 32

gate oxide layer

Question 33

What is a differential amplifier?

Answer 33

An amplifier that amplifies the difference between two input signals.

Question 34

Multiple Choice: In a common-source FET amplifier, the output is taken from which terminal? A) Source B) Gate C) Drain D) All of the above

Answer 34

C) Drain

Question 35

True or False: FET amplifiers can provide significant power gain.

Answer 35

False

Question 36

What is the primary reason for using FETs in RF applications?

Answer 36

Their ability to operate at high frequencies with low noise.

Question 37

Fill in the blank: FETs can be used in both _______ and _______ amplifier configurations.

Answer 37

inverting; non-inverting

Question 38

What is the role of the drain terminal in a FET?

Answer 38

To collect the current flowing through the channel.

Question 39

Multiple Choice: Which type of FET is typically used in digital circuits? A) JFET B) MOSFET C) BJT D) IGBT

Answer 39

B) MOSFET