Related Questions

The impurity atoms is semiconductors
A Inject more charge carriers
B Reduce the energy gap
C Increase the kinetic energy of valence electrons
D All of the above
When a piece of pure silicon is doped with aluminium, then
A the conductivity of the doped silicon piece will remain the same
B the doped silicon piece will become n-type
C the doped silicon piece will become p-type
D the resistivity of the doped silicon piece will increase
Is an element used in semiconductors whose atoms have three valence electrons.
A An acceptor
B A donor
C Germanium
D Silicon
An SCR is made of silicon and not germanium because silicon
A Is inexpensive
B Is mechanically strong
C Has small leakage current
D Is tetravalent
Silicon percentage in silicon steel used for electrical equipments is about
A 1
B 4.0
C 8
D 14
Silicon percentage in the silicon steel used for electrical appliances/equipments is
A 0.3-0.4
B 12-14
C 3-4
D 20-25
Silicon atoms combine into an orderly pattern called a
A Crystal
B Covalent bond
C Semiconductor
D Valence orbit
E None of the above
When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as
A Isomers
B Isotopes
C Isobars
D Isotones
When two semiconductors of p and n-type are brought in contact, they form p-n junction which acts like a/an
A Conductor
B Oscillator
C Rectifier
D Amplifier
The conduction of electricity, in semiconductors, takes place due to movement of
A Positive ions only
B Negative ions only
C Positive and negative ions
D Electrons and holes

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