Canadian Basic Qualification pool, section B-004-004

Subelement B-004

B-004

Section B-004-004

B-004-004-001

When considering the material between source and drain, what are two basic types of field-effect transistors (FET)?

A.
Gallium and arsenide
B.
Silicon and germanium
Correct Answer
C.
N channel and P channel
D.
NPN and PNP

B-004-004-001

In a field-effect transistor, Source and Drain are the two extremities of a 'channel' made of a single semiconductor type. NPN and PNP are the two types of BIPOLAR Transistors.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-002

Which semiconductor device has a gate, a drain and a source?

Correct Answer
A.
Field-effect transistor
B.
Point-contact transistor
C.
Unijunction transistor
D.
Bipolar transistor

B-004-004-002

Source / Gate / Drain are electrodes in a Field Effect Transistor (FET, N-Channel or P-Channel). Emitter / Base / Collector are electrodes in a Bipolar Transistor ( type PNP or NPN ). Cathode / Grid / Anode (plate) are electrodes in a vacuum triode.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-003

In a field-effect transistor, which electrode controls the resistance of the device's channel?

A.
Drain
B.
Collector
C.
Source
Correct Answer
D.
Gate

B-004-004-003

Comparing Triode / Bipolar Transistor / FET in terms of their RESPECTIVE electrodes: Origin of charge carriers = Cathode / Emitter / Source. Control electrode = Grid / Base / Gate. Destination of charge carriers = Anode (plate) / Collector / Drain.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-004

In a field-effect transistor, from which electrode do charge carriers enter the channel?

A.
Emitter
B.
Gate
C.
Drain
Correct Answer
D.
Source

B-004-004-004

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-005

In a field-effect transistor, from which electrode do charge carriers leave the channel?

Correct Answer
A.
Drain
B.
Source
C.
Collector
D.
Gate

B-004-004-005

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-006

Why is a field-effect transistor considered a high impedance device?

A.
It functions at low voltage
Correct Answer
B.
The gate never conducts current
C.
It functions at high current
D.
It uses high resistance semiconductors

B-004-004-006

Unlike the bipolar transistor where a current through the Base is required, the gate of the field-effect transistor is under reverse polarization and no current flows through it. A circuit that does not allow current has a high impedance.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-007

What is the control electrode in a field-effect transistor?

A.
Base
Correct Answer
B.
Gate
C.
Source
D.
Drain

B-004-004-007

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-008

In a field-effect transistor, what circuit parameter change causes the current to increase?

A.
A forward bias is removed
B.
A forward bias is applied
Correct Answer
C.
The reverse bias is decreased
D.
The reverse bias is increased

B-004-004-008

The triode and the FET both rely on a reverse voltage on their control electrodes to affect the current through the device. A reduced reverse polarization on that electrode allows more current through the device.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-009

Which electrode of a bipolar transistor corresponds to the source of a field-effect transistor?

A.
Base
Correct Answer
B.
Emitter
C.
Collector
D.
Drain

B-004-004-009

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-010

Which electrode of a bipolar transistor corresponds to the drain of a field-effect transistor?

A.
Base
B.
Source
Correct Answer
C.
Collector
D.
Emitter

B-004-004-010

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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B-004-004-011

In a field-effect transistor, which two electrodes are connected to the ends of the channel?

A.
Source and base
B.
Gate and drain
C.
Source and gate
Correct Answer
D.
Source and drain

B-004-004-011

Source and Drain are the two ends of the same block of semiconductor material, the 'Channel'. Only the control electrode, the Gate, is made of the opposite type of material.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

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