At absolute zero, Si acts as
non-metal
metal
insulator
None of these
When arsenic is added as an impurity to silicon, the resulting material is
n-type semiconductor
p-type semiconductor
n-type conductor
Sodium has body centred packing. If the distance between two nearest atoms is 3.7 Å, then the lattice parameter is
3.3 Å
3.9 Å
4.3 Å
4.8 Å
In a junction diode, the holes are due to
protons
extra electrons
neutrons
missing electrons
Which of the following when added as an impurity into silicon produces n-type semiconductor?
P
Al
B
Mg
The transfer ratio β of a transistor is 50. The input resistance of the transistor when used in the common emitter configuration is 1kΩ. The peak value of the collector AC current for an AC input voltage of 0.01V peak is
100 μA
0.01 mA
0.25 mA
500 μA
To obtain a p-type germanium semiconductor, it must be doped with
phosphorus
indium
antimony
arsenic
Transistors are
electrons - sensitive device
pressure - sensitive device
holes - sensitive device
temperature - sensitive device
When n-type semiconductor is heated
number of electrons increases while that of holes decreases
number of holes increases while that of electrons decreases
number of electrons and holes remain same
number of electrons and holes increases equally
The correct relationship between the two current gains and in a transistor is
