Semiconductor Theory: Any of a class of crystalline solids intermediate in electrical conductivity between a conductor and an insulator.

This is an MCQ-based quiz on Semiconductor Theory.

This includes An insulator, An intrinsic semiconductor, p-type semiconductor, n-type semiconductorCovalent, Electrovalent, and Co-ordinate.

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If p is holes density, n is electrons density and Ω is electron mobility thanconductivity of semiconductor due to holes is given by

n Ωelectrons n+ Ωelectrons p Ωholes pn Ωholes Ωelectrons

Outer most shell of atom with highest energy level is known as

1st shell

2nd shell

Valence shell

Hole shell

Holes in n-type materials are called

Majority carriers

Minority carriers

Medium carriers

Zero carriers

Atom within crystal structure are held together by

Secondary bond

Covalent bond

Ionic bond

Hydrogen bond

When temperature increases, intrinsic concentration increases which results in increase of

Resistivity

Conductivity

Capacitivity

Infinite

The strength of a semiconductor crystal comes from

Forces between nuclei Forces between protons Electron-pair bonds None of the above

The impurity level in an extrinsic semiconductor is about of pure semiconductor.

10 atoms for 108 atoms 1 atom for 108 atoms 1 atom for 104 atoms 1 atom for 100 atoms

A hole and electron in close proximity would tend to ___________

Repel each other Attract each other Have no effect on each other None of the above

A semiconductor has generally ___________ valence electrons.

2 3 6 4

A pentavalent impurity has ___________ Valence electrons

3 5 4 6

A semiconductor is formed by ……… bonds.

Covalent Electrovalent Co-ordinate None of the above

A semiconductor has ………… temperature coefficient of resistance.

Positive Zero Negative None of the above

The most commonly used semiconductor is ………..

Germanium Silicon Carbon Sulphur

The resistivity of a pure silicon is about ……………

100 Ω cm 6000 Ω cm 3 x 105 Ω m 6 x 10-8 Ω cm
Quiz/Test Summary
Title: Semiconductor Theory: Any of a class of crystalline solids intermediate in electrical conductivity between a conductor and an insulator.
Questions: 14
Contributed by:
Diego