Semiconductor Physics and Diodes MCQs

Question 1

One of the following is not a semiconductor

Accepted Answer

Indium

Answer

GaAs (Gallium Arsenide)

Answer

Germanium (Ge)

Answer

Silicon (Si)

Question 2

Out of the three most commonly employed semiconductor materials, Ge, Si, GaAs, the one with highest forbidden energy gap is

Accepted Answer

GaAs

Answer

Ge

Answer

Si

Answer

He

Question 3

An intrinsic semiconductor

Accepted Answer

is one wohse electrical properties are essentially those of pure crystal

Answer

has a lower value of resistivity amount other semiconductors of the same material

Answer

is one whose electrical properties depend upon the nature of impurities added

Answer

none of these

Question 4

An extrinsic semiconductor is one

Accepted Answer

Whose electrical characteristics depend upon nature of impurities added

Answer

whose electrical characteristics are those of ideal or pure crystal

Answer

with a higher resistivity than intrinsic of the same material

Answer

none of these

Question 5

A defect semiconductor

Accepted Answer

is one whose electrical properties depend upon the departure of the material form stoichometric structure

Answer

is another name for N-type semiconductors

Answer

is the one sufferign from some inherent defects

Answer

is one which has a deficiency of charge carriers

Question 6

Semiconductor generation rate is a term

Accepted Answer

used to indicated time rate of creation of electron-hole pairs in semiconductors

Answer

used in semiconductor industry indicating the number of semiconductors produced every day

Answer

used to indicate rise in current in a semiconductor as the voltage is increased

Answer

none of these

Question 7

Semiconductor junction is

Accepted Answer

a region of transition between semiconducting regions of different electrical properties

Answer

a transition between two semiconducting regions

Answer

produced when a P-type material is joined to an N-type material or vice-versa

Answer

none of these

Question 8

A junction that is formed by adding controlled amount of an impurity to the melt during crystal growth is termed as

Accepted Answer

doped junction

Answer

alloy junction

Answer

fused junction

Answer

none of these

Question 9

A junction which is produced by recrystallization on a base crystal from a liquid phase of one or more components and the semiconductor is called

Accepted Answer

fused junction

Answer

doped junction

Answer

alloy junction

Answer

none of these