When arsenic is added as an impurity to silicon, the resulting material is
n-type semiconductor
p-type semiconductor
n-type conductor
insulator
A half wave rectifier is being used to rectify an alternating voltage of frequency 50 Hz. The number of pulses of rectified current obtained in one second is
25
100
50
200
In p-type semiconductors, current conduction is due to
only free electrons
only holes
greater number of holes and less number of electrons
greater number of electrons and less number of holes
At 0 k, an intrinsic semiconductor behaves as
a super conductor
a semi conductor
a perfect conductor
a perfect insulator
To obtain a p-type germanium semiconductor, it must be doped with
phosphorus
indium
antimony
arsenic
In a junction diode, the holes are due to
protons
extra electrons
neutrons
missing electrons
The part of the transistor which is heavily doped to produce large number of majority carriers is
emitter
base
collector
Any of the above depending upon the nature of transistor
Transistors are
electrons - sensitive device
pressure - sensitive device
holes - sensitive device
temperature - sensitive device
The unit of capacitance is
henry
farad
weber
tesla
p - n junction is said to be forward biased, when
the positive pole of the battery is joined to the p-semiconductor and negative pole to the n- semiconductor.
the positive pole of the battery is joined to the n - semiconductor and negative pole to the p - semiconductor
the positive pole of the battery is connected to the n - semiconductor and p - semiconductor
a mechanical force is applied in the forward direction
