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WorksheetsPIS - Unit 2 - Semiconductor Physics - Quiz 1
Total questions: 15
Worksheet time: 8mins
A semiconductor has generally ……………… valence electrons.
2
3
6
4
The forbiddenn energy gap for Germanium is of the order of
(a) 0.7 eV
(b) 0.3 eV
(c) 1.1 eV
(d) 10 eV
Doping of Semiconductors
materials which can conduct electricity better than insulator, but not as well as conductors.
The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.
when 4 electrons in outermost orbit.
The process of adding an impurity to an intrinsic semiconductor is called
Doping
Ionization
Recombination
Atomic modification
Which among these is NOT a semiconductor
Germanium
Silicon
Gallium Arsenide
Titanium
Electrons and holes are equal in magnitude but opposite in polarity
True
False
An n type semiconductor is negatively charged
True
False
The forbidden energy gap for Silicon is of the order of
0.7 eV
0.3 eV
1.1 eV
10 eV
Who contribute to the current in a semiconductor
electrons only
holes only
negative ions
both electrons and holes
At room temperature, an intrinsic semiconductor has ……….
Many holes only
A few free electrons and holes
Many free electrons only
No holes or free electrons
The minority carriers in P-type silicon are called _________________
Neutron
Proton
Electron
Hole
conductivity of semiconductor increases with increase in temperature, because
number density of free charge carriers increases
relaxation time increases
both number density of free charge carriers and relaxation time increases
number density of free charge carriers increases relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density
Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of
diode
semiconductor
conductor
insulator
superconductor
Which is not one of the properties of semiconductor?
4 electrons in outermost orbit, in covalent bonding.
atoms vibrate causes electron to break free from the bonds.
Electron free leaves hole.
Semiconductor has 2 types of charge carriers.
all of the above are the properties of it
What is the most common semiconductor material used for producing integrated circuits
Quartz
Silicon
Diamond
Tantalum
