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WorksheetsSemiconductor Quiz
Total questions: 32
Worksheet time: 2hrs 36mins
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.
which statement is correct? (the dark circles represent the electrons)
p-type of the diode is connected to the negative terminal.
Electron moves across the p-n junction, makes the diode forward biased
current will not flow in the circuit
reverse biased circuit
The process of adding an impurity to an intrinsic semiconductor is called
Doping
Ionization
Recombination
Atomic modification
Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of
diode
semiconductor
conductor
insulator
superconductor
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.
This is a graph that is seen on CRO. How is it change after it flows through diode?
An atom consists of
one nucleus and only one electron
one nucleus and one or more electrons
protons, electrons and neutrons
The nucleus of an atom is made up of
protons and neutrons
electrons
electrons and protons
electrons and neutrons
Valence electrons are
in the closest orbit to the nucleus
in the most distant orbit from the nucleus
in various orbits around the nucleus
not associated with a particular atom
The most widely used semi-conductive material in electronic device
germanium
carbon
cooper
silicon
The energy band in which free electrons exist is the
first band
second band
conductive band
valence band
The current in a semiconductor is produced by
electron only
holes only
negative ions
both electrons and holes
A pn junction is formed by
the recombination of electrons and holes
ionization
the boudary of a p-type and an n-type material
the collision of a proton and a neutron
The maximum number of electrons that can exist in the third shell/orbit is
2
8
18
32
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
Outer most shell of atom with highest energy level is known as
1st shell
2nd shell
valence shell
conduction shell
Copper, silver and gold are good
insulators
semiconductors
conductors
super insulators
What is the most common semiconductor material used for producing integrated circuits
Quartz
Silicon
Diamond
Tantalum
Valence electrons are
in the closest orbit to the nucleus
in the most distant orbit from the nucleus
in various orbits around the nucleus
not associated with a particular atom
Hole is
an anti-particle of electron
a vacancy created when an electron leaves a covalent bond.
absence of free electrons.
an artifically created particle
How many electrons can be in the first atomic shell?
2
8
18
36
How many electrons can be in the second shell?
2
4
8
18
How many electrons are typically in the valance shell of a semiconductor?
2
4
8
18
Does pure silicon conduct electricity?
Always
Limited
Never
What does the charger do?
Convert DC to AC
Convert AC to DC
Both of them
None of them
what we have inside of a charger?
Transformer
Diode
none of them
both of them
Why do we need a transformer in the charger?
Boosting up the voltage
Lowering down the voltage
What does the diode do?
Making a uni directional current flow.
Making a bi directional current flow.
what are two types of doping?
P-type
N-type
M-type
A-type
How is the P-type doping works?
Adding an element which has an extra electron
Adding an element which has a less electron
Adding an element which has an extra Neutron
Adding an element which has a less Neutron
How is the N-type doped semiconductor made?
Adding an element which has an extra electron
Adding an element which has a less electron
Adding an element which has an extra Neutron
Adding an element which has a less Neutron.
What material is used for p-type doping?
copper
Iron
Boron
Phosphorous
