VITEEE SERIES Physics
Semiconductor Electronics Materials Devices And Simple Circuits
9 previous year questions.
Volume: 9 Ques
Yield: Medium
High-Yield Trend
2
2014 2
2013 2
2010 1
2007 1
2006 1
2005 Chapter Questions 9 MCQs
01
PYQ 2005
medium
physics ID: viteee-2
Zener diode is used for
1
producing oscillations in an oscillator
2
amplification
3
stabilisation
4
rectification
02
PYQ 2006
medium
physics ID: viteee-2
In a P-type semiconductor, the acceptor impurity produces an energy level
1
just below the valence band
2
just above the conduction band
3
just below the conduction band
4
just above the valence band
03
PYQ 2007
medium
physics ID: viteee-2
A conductor and a semi-conductor are connected in parallel as shown in the figure. At a certain voltage both ammeters registers the same current. If the voltage of the DC source is increased then
1
the ammeter connected to the semiconductor will register higher current than the ammeter connected to the conductor
2
the ammeter connected to the conductor will register higher current than the ammeter connected to the semiconductor
3
the ammeters connected to both semiconductor and conductor will register the same current
4
the ammeter connected to both semiconductor and conductor will register no change in the current
04
PYQ 2010
medium
physics ID: viteee-2
Zener diode is used for
1
producing oscillations in an oscillator
2
amplification
3
stabilisation
4
rectification
05
PYQ 2010
medium
physics ID: viteee-2
Zener diode is used for
1
amplification
2
rectification
3
stabilisation
4
producing oscillations in an oscillator.
06
PYQ 2013
medium
physics ID: viteee-2
Mobilities of electrons and holes in a sample of intrinsic germanium at room temperature are and . The electron and hole densities are each equal to . The electrical conductivity of germanium is
1
2
3
4
07
PYQ 2013
easy
physics ID: viteee-2
To get an gate from a gate, we need
1
Only two NAND gates
2
Two NOT gates obtained from NAND gates and one NAND gate
3
Four NAND gates and two AND gates obtained from NAND gates
4
None of the above
08
PYQ 2014
medium
physics ID: viteee-2
The output of the logic circuit shown in figure is best represented as
1
2
3
4
09
PYQ 2014
medium
physics ID: viteee-2
The amplification factor of a triode is . If the grid potential is decreased by . What increase,in plate potential will keep the plate current unchanged?
1
5 V
2
10V
3
0.2V
4
50V