01.The emitter of a transistor is generally doped the heaviest because it
has to supply the charge carriers.
02.Voltage power supplies use a high resistance across the output of the supply. That resistance is called
bleeder resistors.
03.For a NPN bipolar transistor, diffusion of holes is the
main stream of current in the base region.
04.Application of DC voltage to a diode, transistor, or other device to produce a desired mode of operation is called
biasing.
05.The transistor configuration which provides highest output impedance is
Common Base.
06.For transistor, turn-off time that is
Sum of storage time and fall time.
07.The emitter resistor RE is bypassed by a capacitor in order to
increase the voltage gain.
08.The action of a JFET in its equivalent circuit can best be represented as a
Voltage Controlled Current Source.
09.An electron in the conduction band
Has a higher energy than an electron in the valence band.
10.Resistivity of a semiconductor depends upon–
Atomic nature of the semiconductor.
11.In an intrinsic semiconductor
Both electrons and holes carry current.
12.In a good conductor, the energy gap between the conduction band and the valence band is
Zero.
13.The energy band gap of silicon is
1.1 eV.
14.P-type semiconductor is prepared by doping silicon or germanium semoconductor by
Trivalent impurity atoms.
15.N-type semiconductor is obtained when silicon or germanium is doped
Phosphorus.
16.P-type semiconductors are–
Electrically neutral.
17.The addition of a very small quantity of aluminium to a silicon or germanium crystal makes it
P-type semiconductor.
18.The most commonly used semiconductor is
Silicon.
19.An intrinsic semiconductor at the absolute zero of temperature
Behaves like an insulator.
20.The forbidden energy gap is largest in the case of
Insulators.
21.The majority carriers of electricity in a N-type semiconductor are
Free electons.
22.The addition of pentavalent impurity to a semiconductor creates more
Free electrons.
23.Reverse bias on a junction diode
Raises the junction potential barrier.
24.The width of the depletion layer in a P-N junction diode
Increases when a reverse bias is applied.
25.Nucleus is made of
Protons and neutrons.
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