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Canadian Advanced Exam Question Bank

effective 4/01/2007

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A-002-01: Germanium, silicon, gallium arsenide, doping, P-type, N-type

A-002-01-01: What two elements widely used in semiconductor devices exhibit both metallic and non-metallic characteristics?

Silicon and germanium

Galena and germanium

Galena and bismuth

Silicon and gold



A-002-01-02: In what application is gallium-arsenide used as a semiconductor material in preference to germanium or silicon?

At microwave frequencies

In high-power circuits

At very low frequencies

In bipolar transistors



A-002-01-03: What type of semiconductor material contains fewer free electrons than pure germanium or silicon crystals?

P-type

N-type

Bipolar type

Superconductor type



A-002-01-04: What type of semiconductor material contains more free electrons than pure germanium or silicon crystals?

N-type

P-type

Bipolar

Superconductor



A-002-01-05: What are the majority charge carriers in P-type semiconductor material?

Holes

Free electrons

Free protrons

Free neutrons



A-002-01-06: What are the majority charge carriers in N-type semiconductor material?

Free electrons

Holes

Free protrons

Free neutrons



A-002-01-07: Silicon, in its pure form, is:

an insulator

a superconductor

a semiconductor

conductor



A-002-01-08: An element which is sometimes an insulator and sometimes a conductor is called a:

semiconductor

intrinsic conductor

N-type conductor

P-type conductor



A-002-01-09: Which of the following materials is used to make a semiconductor?

silicon

tantalum

copper

sulphur



A-002-01-10: Substances such as silicon in a pure state are usually good:

insulators

conductors

tuned circuits

inductors



A-002-01-11: A semiconductor is said to be doped when it has added to it small quantities of:

impurities

protons

ions

electrons





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