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WorksheetsSemiconductors
Total questions: 18
Worksheet time: 9mins
Which among these is NOT the property of a semiconductor?
Four electrons in the valence band forming covalent bonds
At 0 Kelvin semiconductor acts like an insulator
Semiconductors have two type of charge carriers
Semiconductors are temperature insensitive
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
Method implemented to increase conductivity is
Increase electrical field
Increase temperature
Increase doping concentration
Shining light of proper wavelength on the semiconductor
All of the above
Which among these is NOT a semiconductor
Germanium
Silicon
Gallium Arsenide
Titanium
Which of the following DOES NOT hold good for a n type semiconductor
Electron concentration is greater than hole concentration
Obtained by doping an intrinsic semiconductor with a trivalent impurity
Dopants are Phosphorous or Arsenic
Minority charge carriers are holes
Electrons and holes are equal in magnitude but opposite in polarity
True
False
The maximum energy that an electron in a metal has at the absolute zero temperature is called
(a)
Which semiconductor has higher conductivity at room temperature
Silicon
Germanium
Gallium Arsenide
Which charge carrier has higher mobility?
Electrons
Holes
Both electrons and holes
The electric current produced due to the steady flow of electrons in one direction is called
(a)
An n type semiconductor is negatively charged
True
False
The ratio of majority and minority charge carriers in intrinsic semiconductors is unity
True
False
The forbidden energy gap for Silicon is of the order of
0.7 eV
0.3 eV
1.1 eV
10 eV
Which of the following is a symbol of NPN transistor ?
This is a graph that is seen on CRO. How is it change after full wave rectification process?
What is the name of this component?
PN junction
LED
silicon
PNP
Who contribute to the current in a semiconductor
electrons only
holes only
negative ions
both electrons and holes
