Canadian Advanced pool, section 2-06

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Subelement 2

Advanced Components and Circuits

Section 2-06

amplifiers - classes A, AB, B and C

2-06-01

For what portion of a signal cycle does a Class A amplifier operate?

A.
Exactly 180 degrees
B.
More than 180 degrees but less than 360 degrees
Correct Answer
C.
The entire cycle
D.
Less than 180 degrees

2-06-01

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2-06-02

Which class of amplifier has the highest linearity and least distortion?

Correct Answer
A.
Class A
B.
Class AB
C.
Class B
D.
Class C

2-06-02

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2-06-03

For what portion of a cycle does a Class AB amplifier operate?

A.
Exactly 180 degrees
B.
The entire cycle
C.
Less than 180 degrees
Correct Answer
D.
More than 180 degrees but less than 360 degrees

2-06-03

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2-06-04

For what portion of a cycle does a Class B amplifier operate?

A.
Less than 180 degrees
B.
More than 180 degrees but less than 360 degrees
Correct Answer
C.
180 degrees
D.
The entire cycle

2-06-04

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2-06-05

For what portion of a signal cycle does a Class C amplifier operate?

A.
More than 180 degrees but less than 360 degrees
Correct Answer
B.
Less than 180 degrees
C.
The entire cycle
D.
180 degrees

2-06-05

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2-06-06

Which class of amplifier provides the highest efficiency?

Correct Answer
A.
Class C
B.
Class A
C.
Class AB
D.
Class B

2-06-06

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2-06-07

In order to provide the greatest efficiency in the output stage of a CW, RTTY or FM transmitter, you would operate the amplifier:

Correct Answer
A.
Class C
B.
Class AB
C.
Class B
D.
Class A

2-06-07

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2-06-08

Which class of amplifier provides the least efficiency?

A.
Class C
B.
Class B
Correct Answer
C.
Class A
D.
Class AB

2-06-08

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2-06-09

Which class of amplifier has the poorest linearity and the most distortion?

A.
Class AB
Correct Answer
B.
Class C
C.
Class A
D.
Class B

2-06-09

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2-06-10

Which class of amplifier operates over the full cycle?

Correct Answer
A.
Class A
B.
Class AB
C.
Class B
D.
Class C

2-06-10

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2-06-11

Which class of amplifier operates over less than 180 degrees of the cycle?

A.
Class AB
Correct Answer
B.
Class C
C.
Class A
D.
Class B

2-06-11

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