AFMC SERIES Physics
Semiconductor Electronics Materials Devices And Simple Circuits
3 previous year questions.
Volume: 3 Ques
Yield: Medium
High-Yield Trend
1
2010 1
2009 1
2007 Chapter Questions 3 MCQs
01
PYQ 2007
easy
physics ID: afmc-200
In semiconductor the concentrations of electrons and holes are and respectively. If the mobilities of electrons and holes are it and respectively, then semiconductor is
1
n-type and its resistivity is 0.34 -m
2
p-type and its resistivity is 0.034 -m
3
n-type and its resistivity is 0.034 -m
4
p-type and its resistivity is 3.4 -m
02
PYQ 2009
medium
physics ID: afmc-200
What is the current through an ideal pn - junction diode shown in figure below?
1
Zero
2
10 mA
3
20 mA
4
50 mA
03
PYQ 2010
medium
physics ID: afmc-201
The output form of a full wave rectifier is
1
an AC voltage
2
a DC voltage
3
zero
4
a pulsating unidirectional voltage