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Field-Effect Transistors (FET)

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Questions and Answers

What distinguishes a field-effect transistor (FET) from a bipolar junction transistor (BJT)?

FET has low input impedance, while BJT has high input impedance.

FET is a voltage-controlled device, while BJT is a current-controlled device. (correct)

FET uses two charge carriers, while BJT depends on either electrons or holes.

FET is a bipolar device, while BJT is a unipolar device.

Which type of charge carriers does the field-effect transistor (FET) depend on for conduction?

Protons

Holes only

Electrons only

Both electrons and holes (correct)

What is the most significant characteristic of a field-effect transistor (FET)?

Bipolar device

Current-controlled device

High input impedance (correct)

Low input impedance

Which of the following is NOT a type of field-effect transistor (FET)?

n-channel field-effect transistor Signup and view all the answers

What does the prefix 'bi-' in 'bipolar device' indicate about the conduction level of the transistor?

It depends on two charge carriers. Signup and view all the answers

What is the main difference between a BJT transistor and an FET transistor?

BJT uses hole conduction, while FET uses electron conduction. Signup and view all the answers

What does the prefix 'bi-' in 'bipolar device' reveal about the BJT transistor?

It indicates the conduction level involves two charge carriers. Signup and view all the answers

Which type of field-effect transistor (FET) relies on either electron or hole conduction?

p-channel FET Signup and view all the answers

What is the fundamental difference between n-channel and p-channel field-effect transistors (FETs)?

N-channel FETs are negatively charged, while p-channel FETs are positively charged. Signup and view all the answers

Which type of device is a BJT transistor, and why?

A current-controlled bipolar device. Signup and view all the answers

Study Notes

Field-Effect Transistors (FET)

A three-terminal device used for various applications.
A voltage-controlled device, unlike BJT transistors which are current-controlled.
Has two categories: n-channel and p-channel FETs, similar to npn and pnp bipolar transistors.

Characteristics

High input impedance is a significant characteristic of FETs.

Types of FETs

Junction Field-Effect Transistor (JFET)
Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET)

Key Differences with BJTs

FETs are unipolar devices, relying on either electron (n-channel) or hole (p-channel) conduction.
BJTs are bipolar devices, depending on two charge carriers: electrons and holes.

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Description

Explore the fundamentals of Field-Effect Transistors (FET) in this quiz. Learn about the differences between FET and BJT transistors, the functionality of n-channel and p-channel FETs, and how FETs are voltage-controlled devices.