Canadian Advanced pool, section 2-01

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Subelement 2

Advanced Components and Circuits

Section 2-01

germanium, silicon, gallium arsenide, doping, P-type, N-type

2-01-01

What two elements widely used in semiconductor devices exhibit both metallic and non-metallic characteristics?

A.
Galena and germanium
Correct Answer
B.
Silicon and germanium
C.
Galena and bismuth
D.
Silicon and gold

2-01-01

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2-01-02

In what application is gallium-arsenide used as a semiconductor material in preference to germanium or silicon?

A.
In high-power circuits
Correct Answer
B.
At microwave frequencies
C.
At very low frequencies
D.
In bipolar transistors

2-01-02

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2-01-03

What type of semiconductor material contains fewer free electrons than pure germanium or silicon crystals?

Correct Answer
A.
P-type
B.
N-type
C.
Bipolar type
D.
Superconductor type

2-01-03

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2-01-04

What type of semiconductor material contains more free electrons than pure germanium or silicon crystals?

Correct Answer
A.
N-type
B.
P-type
C.
Bipolar
D.
Superconductor

2-01-04

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2-01-05

What are the majority charge carriers in P-type semiconductor material?

A.
Free electrons
B.
Free protrons
Correct Answer
C.
Holes
D.
Free neutrons

2-01-05

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2-01-06

What are the majority charge carriers in N-type semiconductor material?

A.
Holes
B.
Free protrons
C.
Free neutrons
Correct Answer
D.
Free electrons

2-01-06

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2-01-07

Silicon, in its pure form, is:

A.
a superconductor
Correct Answer
B.
an insulator
C.
a semiconductor
D.
conductor

2-01-07

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2-01-08

An element which is sometimes an insulator and sometimes a conductor is called a:

A.
intrinsic conductor
B.
N-type conductor
C.
P-type conductor
Correct Answer
D.
semiconductor

2-01-08

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2-01-09

Which of the following materials is used to make a semiconductor?

A.
tantalum
B.
copper
Correct Answer
C.
silicon
D.
sulphur

2-01-09

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2-01-10

Substances such as silicon in a pure state are usually good:

A.
conductors
B.
tuned circuits
C.
inductors
Correct Answer
D.
insulators

2-01-10

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2-01-11

A semiconductor is said to be doped when it has added to it small quantities of:

A.
protons
B.
ions
C.
electrons
Correct Answer
D.
impurities

2-01-11

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