Transistors

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Which type of transistor configuration is most commonly used?

Unipolar Junction Transistor

pnp Transistor

Field Effect Transistor

npn Transistor (correct)

In a bipolar junction transistor, which junction is forward biased?

Emitter-Collector Junction

Emitter-Base Junction

Base-Collector Junction

Base-Emitter Junction (correct)

What is the primary function of the base in an npn transistor?

To provide a path for electron flow

To dissipate excess heat

To collect the majority of current

To control current flow between collector and emitter (correct)

What analogy is used to explain the operation of a bipolar junction transistor?

Fluid Flow Signup and view all the answers

In a pnp transistor, the base must be connected to which potential to allow current flow?

Low potential Signup and view all the answers

Which statement accurately describes the collector in an npn transistor?

It has a higher potential than the emitter. Signup and view all the answers

What occurs when a signal is applied as a current to the base of a BJT?

A valve between the collector and emitter opens and closes. Signup and view all the answers

How is the flow of electricity considered in a BJT?

Flow is considered positive to negative. Signup and view all the answers

What significant problem did transistors solve compared to vacuum tubes?

Reduced size and power consumption Signup and view all the answers

Who were the creators of the first transistors?

William Shockley, John Bardeen, and Walter Brattain Signup and view all the answers

What is the role of dopants in semiconductor materials?

To enhance electrical properties Signup and view all the answers

Which of the following is a P-type dopant?

Boron Signup and view all the answers

Under forward bias conditions in a diode, where does current flow?

From P to N Signup and view all the answers

In N-type semiconductors, which element commonly acts as a dopant?

Phosphorus Signup and view all the answers

Which of the following describes the term 'transistor'?

A combination of transconductance and variable resistor Signup and view all the answers

What happens to dopants in a semiconductor device over time?

They migrate due to excessive heat Signup and view all the answers

What is the minimum number of transistors that can be found in an advanced microprocessor today?

1.7 billion Signup and view all the answers

What occurs during reverse bias in a diode?

Current is blocked Signup and view all the answers

What occurs when the gate voltage of a MOSFET is increased past the threshold voltage?

Electrons from the source and drain form an inversion layer. Signup and view all the answers

What is the channel length in a MOSFET?

The distance between source and drain. Signup and view all the answers

During which state does a MOSFET not conduct current?

When the gate voltage is zero. Signup and view all the answers

What happens to the depletion region when the gate voltage is increased?

The depletion region expands until it covers the entire channel. Signup and view all the answers

What must be present for a MOSFET to operate in the linear (or triode) region?

An applied voltage across the source and drain. Signup and view all the answers

What is the primary difference between FETs and BJTs in terms of their operation?

FETs switch by voltage, BJTs by current. Signup and view all the answers

Which type of transistor is designed to allow for much greater gain in a circuit?

Darlington Transistor. Signup and view all the answers

In a P-N junction, what naturally occurs when no electric fields are present?

A depletion region is created. Signup and view all the answers

What are the primary components of a MOSFET transistor?

Gate, Drain, Source. Signup and view all the answers

Which FET type is most commonly used in practice?

Metal-Oxide-Semiconductor FET. Signup and view all the answers

What additional lead is present in BJTs that is not applicable to FETs?

Collector. Signup and view all the answers

How do the gate leads of MOSFETs and JFETs function in digital circuits?

They act as voltage switches. Signup and view all the answers

What is the role of the body lead in a FET transistor?

It is not applicable to all FETs. Signup and view all the answers

What property defines the operation principles of a bipolar junction transistor?

Current amplification. Signup and view all the answers

When comparing FETs to BJTs, which statement is correct?

FETs are easier to integrate into circuits. Signup and view all the answers

Which terminal of a Bipolar Junction Transistor (BJT) is responsible for controlling the output current?

Base Signup and view all the answers

What distinguishes a Field Effect Transistor (FET) from a Bipolar Junction Transistor (BJT)?

FET operates with conduction involving either holes or electrons. Signup and view all the answers

In an NPN BJT, what is the current flow direction when it is in the active region?

From Emitter to Collector. Signup and view all the answers

Which of the following is true concerning the input resistance of FETs?

FETs have very high input resistance, allowing negligible current flow. Signup and view all the answers

What defines an enhancement-mode FET compared to a depletion-mode FET?

Enhancement-mode FET requires a voltage to turn ON. Signup and view all the answers

What are the main terminals of a Field Effect Transistor (FET)?

Source, Drain, Gate Signup and view all the answers

In which scenario would you use a power transistor?

To handle high current and voltage applications. Signup and view all the answers

What is the primary application of transistors in electronic circuits?

For switching, amplification, and as variable resistors. Signup and view all the answers

How do BJTs operate concerning the current flowing through their terminals?

The Base controls the current into the Emitter and Collector. Signup and view all the answers

Which of the following statements about the operation of an N-channel FET is true?

The channel is typically made from N-type material. Signup and view all the answers