Font size
WorksheetsSEMICONDUCTOR
Total questions: 15
Worksheet time: 7mins
Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of
diode
semiconductor
conductor
insulator
superconductor
These are the characteristics of pentavalent impurities except
•5 valence electron.
•contributing extra free electrons.
•produce n-type semiconductors.
•produce p-type semiconductors.
These are the characteristics of Trivalent impurities except
•3 valence electrons
•produce p-type semiconductors
•producing a "hole".
Boron, aluminium and gallium are the examples.
Antimony, arsenic, and phosphorus are the examples
The process of adding an impurity to an intrinsic semiconductor is called
Doping
Ionization
Recombination
Atomic modification
The minority carriers in P-type silicon are called _________________
Neutron
Proton
Electron
Hole
A semiconductor has generally ……………… valence electrons.
2
3
6
4
When a pentavalent impurity is added to a pure semiconductor, it becomes ………
An insulator
An intrinsic semiconductor
p-type semiconductor
n-type semiconductor
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
With forward bias to a pn junction , the width of depletion layer ………
Decreases
Increases
Remains the same
None of the above
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
An atom consists of
one nucleus and only one electron
one nucleus and one or more electrons
protons, electrons and neutrons
answer (b) and (c)
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 depletion region consists of
no majority carriers
nothing but minority carriers
positive or negative ions
positive ion only
The maximum number of electrons that can exist in the third shell/orbit is
2
8
18
32
Which among these is the fundamental characteristic of a p type semiconductor
Electrons are the majority charge carriers
Has a tendency to gain an electron
Has a tendency to donate an electron
Easy to conduct electricity
