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- Multiple ChoicePlease save your changes before editing any questions.
A semiconductor has generally ……………… valence electrons.
2
3
6
4
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following is a pentavalent impuity added while forming an extrinsic semiconductor ?
Boron
Arsenic
Indium
Gallium
- Multiple ChoicePlease save your changes before editing any questions.
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.
- Multiple ChoicePlease save your changes before editing any questions.
The process of adding an impurity to an intrinsic semiconductor is called
Doping
Ionization
Recombination
Atomic modification
- Multiple ChoicePlease save your changes before editing any questions.
The minority carriers in P-type silicon are called _________________
Neutron
Proton
Electron
Hole
- Multiple ChoicePlease save your changes before editing any questions.
During formation of p-n junction
an electron diffuses from n to p side
a hole diffuses from p to n side
a hole diffuses from n to p side
an electron diffuses from p to n side
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
Which among these is NOT a semiconductor
Germanium
Silicon
Gallium Arsenide
Titanium
- Multiple ChoicePlease save your changes before editing any questions.
Electrons and holes are equal in magnitude but opposite in polarity
True
False
- Multiple ChoicePlease save your changes before editing any questions.
An n type semiconductor is negatively charged
True
False
- Multiple ChoicePlease save your changes before editing any questions.
The forbidden energy gap for Silicon is of the order of
0.7 eV
0.3 eV
1.1 eV
10 eV
- Multiple ChoicePlease save your changes before editing any questions.
Who contribute to the current in a semiconductor
electrons only
holes only
negative ions
both electrons and holes
- Multiple ChoicePlease save your changes before editing any questions.
When a pentavalent impurity is added to a pure semiconductor, it becomes ………
An insulator
An intrinsic semiconductor
p-type semiconductor
n-type semiconductor
- Multiple ChoicePlease save your changes before editing any questions.
Addition of trivalent impurity to a semiconductor creates many ……..
Holes
Free electrons
Valence electrons
Bound electrons
- Multiple ChoicePlease save your changes before editing any questions.
The battery connections required to forward bias a pn junction are ……
+ve terminal to p and –ve terminal to n
-ve terminal to p and +ve terminal to n
-ve terminal to p and –ve terminal to n
None of the above
- Multiple ChoicePlease save your changes before editing any questions.
With forward bias to a pn junction , the width of depletion layer ………
Decreases
Increases
Remains the same
None of the above
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
The term bias in electronics usually means ……….
the value of ac voltage in the signal.
the condition of current through a pn junction.
the value of dc voltages for the device to operate properly.
None of the above
- Multiple ChoicePlease save your changes before editing any questions.
The battery connections required to reverse bias a pn junction are ……
+ve terminal to p and –ve terminal to n
-ve terminal to p and +ve terminal to n
-ve terminal to p and –ve terminal to n
+ve terminal to p and +ve terminal to n