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WorksheetsSEMICONDUCTING MATERIALS
Total questions: 15
Worksheet time: 8mins
____________ are the charge carriers in N- type semiconductors.
electrons
protons
holes
neutrons
P, Sb, As doped with pure Si are the examples of
P-type semiconductors
Penta valent impurities
Intrinsic semiconductors
N-type semiconductors
For intrinsic semiconductor, the number of electrons in the conduction band __________ the number of holes in the valence band.
is equal to
will be less than
will be greater than
will be less than or equal to
In N-type Semiconductors, the energy level of the donor impurities lies
just above the valence band
just below the conduction band
at the centre of the energy band gap
inside the conduction band
In, B, Al doped with pure Si are the examples of
Trivalent impurities
P-type semiconductors
N-type semiconductors
Intrinsic semiconductors
In P-type Semiconductors, the energy level of the acceptor impurity lies
just below the Conduction band
at the centre of the Energy band gap
just above the valence band
inside the valence band
The process of adding impurities to a pure semiconductor is called
mixing
doping
diffusing
refining
The pure Si and Ge Semiconducting materials have ___________ bonds.
ionic
covalent
hydrogen
metallic
In N-type Semiconductor, the Fermi energy level (EF) lies
between Ec and ED
between Ec and Ev
between ED and Ev
inside the valence band
The compound semiconductors are
direct bandgap semiconductors
indirect bandgap semiconductors
pure semiconductors
emitting heat energy during recombination
At room temperature, an intrinsic silicon crystal acts approximately as
A battery
A conductor
An insulator
A piece of copper wire
Which of the following is known as indirect band gap semiconductors?
Germanium
Nickel
Platinum
Phosphorous
The minority carriers in P-type silicon are called _________________
Neutron
Proton
Electron
Hole
A semiconductor has ………… temperature coefficient of resistance.
Positive
Zero
Negative
None of the above
Which column elements are combined to make compound semiconductors?
First and fourth
Fifth and sixth
Second and fourth
Third and fifth
