The correct relationship between the two current gains and in a transistor is
NAND
OR
AND
XOR
Which of the following, when added as an impurity, into the silicon, produces n-type semiconductor?
Phosphorus
Aluminium
Magnesium
Both (b) and (c)
When a triode is used as an amplifier the phase difference between the input signal voltage and the output is
zero
In a junction diode, the holes are due to
protons
extra electrons
neutrons
missing electrons
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
To obtain a p-type germanium semiconductor, it must be doped with
phosphorus
indium
antimony
arsenic
The following truth table belongs to which of the following four gates?
NOR
Which of the following when added as an impurity into silicon produces n-type semiconductor?
P
Al
B
Mg
