Transistors are
electrons - sensitive device
pressure - sensitive device
holes - sensitive device
temperature - sensitive device
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
Phosphorus
Aluminium
Magnesium
Both (b) and (c)
Radio waves of constant amplitude can be generated with
FET
filter
rectifier
oscillator
emitter
base
collector
Any of the above depending upon the nature of transistor.
When a triode is used as an amplifier the phase difference between the input signal voltage and the output is
zero
Which one of the following is the weakest kind of the bonding in solids?
Ionic
Metallic
Van der Waals'
Covalent
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 electrons and holes remain same
number of electrons and holes increases equally
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
