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WorksheetsIntrinsic and Extrinsic Semiconductors Quiz
Total questions: 15
Worksheet time: 8mins
What is an intrinsic semiconductor?
A semiconductor doped with a trivalent impurity
A pure semiconductor with no impurities
A metal with high conductivity
A superconductor at room temperature
Which of the following is an example of an intrinsic semiconductor?
Germanium doped with arsenic
Silicon doped with boron
Pure germanium
Aluminum
In an intrinsic semiconductor, the number of electrons is:
Greater than the number of holes
Equal to the number of holes
Less than the number of holes
Zero
The conductivity of an intrinsic semiconductor increases with:
Decrease in temperature
Increase in pressure
Increase in temperature
Decrease in pressure
What is the main limitation of intrinsic semiconductors?
Very high conductivity
Very low conductivity at room temperature
Cannot be doped
They are metals
What is an extrinsic semiconductor?
A pure semiconductor
A semiconductor with added impurities
A superconductor
An insulator
Doping silicon with a pentavalent atom results in a:
P-type semiconductor
Intrinsic semiconductor
N-type semiconductor
Metallic conductor
Which element is commonly used as a pentavalent dopant?
Boron
Gallium
Phosphorus
Indium
In an N-type semiconductor, the majority charge carriers are:
Holes
Electrons
Protons
Neutrons
In a P-type semiconductor, the majority carriers are:
Electrons
Holes
Neutrons
Positrons
Doping a semiconductor increases its:
Mass
Lattice energy
Conductivity
Melting point
Which of the following is a trivalent dopant?
Arsenic
Antimony
Boron
Phosphorus
The band gap in an intrinsic semiconductor is:
Zero
Very large
Small
Infinite
Which of the following statements is true for extrinsic semiconductors?
They are completely pure
They conduct electricity only at absolute zero
They are more conductive than intrinsic semiconductors
They have equal numbers of electrons and holes
The process of adding impurities to a pure semiconductor is called:
Depletion
Insulation
Polarization
Doping
