January 19, 2023
Welcome to your Basic Electronics MCQ practice assessment.
If the input frequency of a half wave rectifier is 100Hz, then the ripple frequency will be_________
An n-type semiconductor material
requires no doping
has trivalent impurity atoms added
has pentavalent impurity atoms added
. In a semiconductor, current conduction is due to ……..
Only free electrons
Holes and free electrons
In an n-type semiconductor, as temperature T increases, the Fermi level EF
moves towards conduction band
moves towards middle of forbidden energy gap
may or may not shift depending upon the concentration of donor atoms
does not vary
The barrier potential for Silicon diode is:
The most widely used semiconductive material in electronic device is
An intrinsic semiconductor at the absolute zero temperature
behaves like an insulator
has a large number of electrons
has a large number of holes
behaves like a metallic conductor
A semiconductor is formed by ……… bonds.
Doping materials are called impurities because they
Alter the crystal structures of the pure semiconductors
Make semiconductors less than 100 percent pure.
Change the chemical properties of semiconductors
Decrease the number of charge carriers.
Avalanche breakdown results basically due to
emission of electrons
rise in temperature
strong electric field across the junction
The atomic number of silicon is
The conductivity of a semiconductor is
similar to an insulator
between a conductor and semiconductor
A positive ion is formed when
an atom gains extra valence electron
valence electron breaks away from the atom
there are more holes than electrons in the outer orbit
two atoms bond together
Electron-holes pairs are produced by
As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor
Remains the same
The forward voltage across a conducting silicon diode is about
The movement of free electrons in a conductor is called
Zener diodes are most commonly used in:
current limiting circuits
voltage amplifier circuits
power supply circuits
Holes in an n-type semiconductor are
minority carriers that are thermally produced
majority carriers that are thermally produced
minority carriers that are produced by doping
majority carriers that are produced by doping
Which statement best describes an insulator?
A material with few free electrons
No description fits
A material doped to have some free electrons
A material with many free electrons.
Time is Up!