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 remains same
number of electrons and holes increases equally
Radio waves of constant amplitude can be generated with
FET
Filter
Rectifier
Oscillator
For a full wave rectifier, the minimum number of diodes required is
2
3
4
1
On increasing the reverse bias to a large valve in a p-n junction, the diode current
remains fixed
increases slowly
decreases slowly
suddenly increases
In a junction diode, the holes are due to
protons
extra electrons
neutrons
missing electrons
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
A capacitor having capacitance of 1.2 μF is connected to a 2 V power supply. Calculate the amount of charge connected on the capacitor.
2.4 x 10-6 C
2.3 x 10-3 C
2.2 x 10-2 C
1.8 x 10-6 C
Transistors are
electrons - sensitive device
pressure - sensitive device
holes - sensitive device
temperature - sensitive device
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
Barrier potential of a p-n junction diode does not depend on
forward bias
doping density
diode design
temperature
