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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