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

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1 Answer

Answer :

The impurity level in an extrinsic semiconductor is about 1 atom for 108 atoms of pure semiconductor.

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Related questions

Impurity atoms to be added to pure silicon in order to make a p-type semiconductor belongs to

Description : Impurity atoms to be added to pure silicon in order to make a p-type semiconductor belongs to (a) Phosphorous (b) Boron (c) Antimony (d) Aluminium 

Last Answer : Boron  , a  group  three  element.

When a pentavalent impurity is added to a pure semiconductor, it becomes ………

Last Answer : When a pentavalent impurity is added to a pure semiconductor, it becomes n-type semiconductor.

When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on……

Last Answer : When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on Minority carriers.

Addition of trivalent impurity to a semiconductor creates many ……..

Last Answer : Addition of trivalent impurity to a semiconductor creates many Holes.

Addition of pentavalent impurity to a semiconductor creates many ……..

Last Answer : Addition of pentavalent impurity to a semiconductor creates many Free electrons.

The process of addition of impurity in pure semiconductor is : a) Doping b) Radiating c) Mixing d) Insulating

Description : The process of addition of impurity in pure semiconductor is : a) Doping b) Radiating c) Mixing d) Insulating

Last Answer : d) Insulating

As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor ………..

Last Answer : As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor Decreases.

When a pure semiconductor is heated, its resistance …………..

Last Answer : When a pure semiconductor is heated, its resistance Goes down.

Which of the following serves as donor impurity in Silicon?

Description : Which of the following serves as donor impurity in Silicon?  (A) Boron (B) Indium (C) Germanium (D) Antimony 

Last Answer : Which of the following will serve as a donor impurity in silicon?   (A) Boron (B) Indium (C) Germanium (D) Antimony

A trivalent impurity has ….. valence electrons

Last Answer : A trivalent impurity has 3 valence electrons.

A pentavalent impurity has ………. Valence electrons

Last Answer : A pentavalent impurity has 5 Valence electrons.

In a single crystal of an intrinsic semiconductor, the number of free carriers at the Fermi level at room

Description : In a single crystal of an intrinsic semiconductor, the number of free carriers at the Fermi level at room temperature is: A) Half the total number of electrons in the crystal B) Zero C) Half the number of atoms in the crystal D) Half the number of free electrons in the crystal

Last Answer : In a single crystal of an intrinsic semiconductor, the number of free carriers at the Fermi level at room temperature is: Zero 

In an n-type semiconductor, as the donor concentration ND increases, the Fermi level EF:

Description : In an n-type semiconductor, as the donor concentration ND increases, the Fermi level EF: (1) Remains unaltered (2) Moves towards the conduction band (3) Move towards the center of forbidden energy gap (4) May or may not move depending on temperature 

Last Answer : In an n-type semiconductor, as the donor concentration ND increases, the Fermi level EF: Moves towards the conduction band

When Arsenic atoms are added Germanium lattice, it becomes a/an - (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Description : When Arsenic atoms are added Germanium lattice, it becomes a/an - (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Last Answer : (4) Extrinsic semiconductor Explanation: When a peritavalent (donor) impurity, like arsenic, is added to germanium, it will form covalent bonds with thegermanium atoms, leaving 1 electron relatively ... this manner - either with Nor P-type impurities - are referred to as EXTRINSIC semiconductors.

In a transistor, the base is _______. (1) an insulator (2) a conductor of low resistance (3) a conductor of high resistance (4) an extrinsic semiconductor

Description : In a transistor, the base is _______. (1) an insulator (2) a conductor of low resistance (3) a conductor of high resistance (4) an extrinsic semiconductor

Last Answer : (2) a conductor of low resistance Explanation: A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. It is composed of semiconductor material with at least three terminals for connection to an external circuit.

Differentiate between intrinsic and extrinsic semiconductor

Description : Differentiate between intrinsic and extrinsic semiconductor

Last Answer : Pure form of semiconductors are said to be intrinsic semiconductor. Ex: germanium, silicon. It has poor conductivity If certain amount of impurity atom is added to intrinsic semiconductor the resulting semiconductor is Extrinsic or impure Semiconductor It has good conductivity.

What is an extrinsic semiconductor or doped?

Description : What is an extrinsic semiconductor or doped?

Last Answer : A semiconductor whose conductivity is enhanced by addition of minute traces ofimpurities is called doped or extrinsic semiconductor.

A doped semiconductor is called : a) Extrinsic b) Intrinsic c) Insulator d) Conductor

Description : A doped semiconductor is called : a) Extrinsic b) Intrinsic c) Insulator d) Conductor

Last Answer : b) Intrinsic

The conductivity of an extrinsic semiconductor (A) decreases with temperature. (B) increases with temperature. (C) remains constant with temperature. (D) decreases and then increases with temperature.

Description : The conductivity of an extrinsic semiconductor (A) decreases with temperature. (B) increases with temperature. (C) remains constant with temperature. (D) decreases and then increases with temperature.

Last Answer : (B) increases with temperature.

n-type semiconductor is an example of (A) extrinsic semiconductor. (B) intrinsic semiconductor. (C) super conductor. (D) insulators..

Description : n-type semiconductor is an example of (A) extrinsic semiconductor. (B) intrinsic semiconductor. (C) super conductor. (D) insulators..

Last Answer : (A) extrinsic semiconductor.

When Arsenic atoms are added to Germanium lattice, it becomes a/an (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Description : When Arsenic atoms are added to Germanium lattice, it becomes a/an (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Last Answer : Extrinsic semiconductor

Define intrinsic and extrinsic semiconductor.

Description : Define intrinsic and extrinsic semiconductor. 

Last Answer : Intrinsic – Semiconductor in pure form is called as intrinsic semiconductor. Extrinsic – Semiconductor with added impurity is called as extrinsic semiconductor.

Compare intrinsic and extrinsic semiconductor

Description : Compare intrinsic and extrinsic semiconductor

Last Answer : Intrinsic semiconductor Extrinsic Semiconductor Pure form of semiconductor Impure form of semiconductor No. electrons and holes are equal  No. of electrons and holes are not equal Electrical ... e.g. Ge, Si semiconductor e.g. p-type or n-type semiconductor

Define the term-Dopant, Extrinsic semiconductor.

Description : Define the term-Dopant, Extrinsic semiconductor. 

Last Answer : Dopant: - An element or compound used to dope a semiconductor is called dopant.  Extrinsic Semiconductor:- In order to increase current carrying capacity some impurity are added in a semiconductor such semiconductor are called extrinsic Semiconductor. 

At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because

Description : At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because (A) Of drive in diffusion of dopants & carriers. (B) Band to band transition dominates impurity ionization. (C) ... band to band transition. (D) Band to band transition is balanced by impurity ionisation.

Last Answer : At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because Impurity ionization dominates band to band transition.

The conductivity of an extrinsic semiconductor with temperature

Last Answer : The conductivity of an extrinsic semiconductor with temperature remains constant.

A semiconductor formed by addition of trivalent impurity is : a) P–Type b) N–Type c) Q–type d) M–Type

Description : A semiconductor formed by addition of trivalent impurity is : a) P–Type b) N–Type c) Q–type d) M–Type

Last Answer : d) M–Type

Addition of trivalent impurity to a semiconductor creates many (A) holes. (B) free electrons. (C) valance electrons. (D) bound electrons.

Description : Addition of trivalent impurity to a semiconductor creates many (A) holes. (B) free electrons. (C) valance electrons. (D) bound electrons.

Last Answer : (B) free electrons.

When a semiconductor is doped with a P-type impurity, each impurity atom will (A) acquire negative charge. (B) acquire positive charge. (C) remain electrically neutral. (D) give away one electron.

Description : When a semiconductor is doped with a P-type impurity, each impurity atom will (A) acquire negative charge. (B) acquire positive charge. (C) remain electrically neutral. (D) give away one electron.

Last Answer : (A) acquire negative charge.

Explain types of impurity added in a semiconductor with one example each.

Description : Explain types of impurity added in a semiconductor with one example each.

Last Answer : There are two types of impurities added in a intrinsic semiconductor which are as follows 1.Donor Impurity 2.Acceptor Impurity 1.Donor Impurity - These are pentavalent which means they have five ... called as Acceptor doping. It is used to manufacture P-type semiconductor Eg:Boron,Gallium,Indium

The advantage of a semiconductor strain gauge cover the wire round strain gauge is that

Description : The advantage of a semiconductor strain gauge cover the wire round strain gauge is that

Last Answer : The advantage of a semiconductor strain gauge cover the wire round strain gauge is that it is more sensitive

The semiconductor used for LEDs emitting in the visible range is

Description : The semiconductor used for LEDs emitting in the visible range is  (a) GaAs (b) GaAlAs (c) GalnAs (d) GaAsP

Last Answer : The semiconductor used for LEDs emitting in the visible range is GaAsP

The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to

Description : The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to  (a) 1 ionic bond and 3 covalent bonds (b) 1 ionic bond and 4 covalent bonds (c) 2 ionic bonds and 2 covalent bonds (d) 2 ionic bonds and 4 covalent bonds

Last Answer : The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to 1 ionic bond and 3 covalent bonds

The material used for ‘doping’ to prepare N - type semiconductor is

Description : The material used for ‘doping’ to prepare N - type semiconductor is

Last Answer : The material used for ‘doping’ to prepare N - type semiconductor is Arsenic

While comparing doped semiconductor vs. un-doped semiconductor, which of the following

Description : While comparing doped semiconductor vs. un-doped semiconductor, which of the following statements is NOT true ? (A) Doped semiconductor has smaller band-gap compared to un-doped semiconductor (B) ... to un-doped semiconductor (D) Doped as well as un-doped semiconductor have equal bandwidth

Last Answer : While comparing doped semiconductor vs. un-doped semiconductor, which of the following statements is NOT true ? (A) Doped semiconductor has smaller band-gap compared to un-doped semiconductor (B) ... to un-doped semiconductor (D) Doped as well as un-doped semiconductor have equal bandwidth

To increase mobility of electron in a given piece of semiconductor

Description : To increase mobility of electron in a given piece of semiconductor (A) Increase overall size of the semiconductor (B) Increase length (C) Increase width (D) Small increase in temperature above room temperature value

Last Answer : To increase mobility of electron in a given piece of semiconductor Small increase in temperature above room temperature value

At absolute temperature, an intrinsic semiconductor has ……….

Last Answer : At absolute temperature, an intrinsic semiconductor has No holes or free electrons.

At room temperature, an intrinsic semiconductor has ……….

Last Answer : At room temperature, an intrinsic semiconductor has A few free electrons and holes.

In an intrinsic semiconductor, the number of free electrons ………

Last Answer :  In an intrinsic semiconductor, the number of free electrons Equals the number of holes.

In a semiconductor, current conduction is due to ……..

Last Answer : In a semiconductor, current conduction is due to Holes and free electrons.

A hole in a semiconductor is defined as …………….

Last Answer : A hole in a semiconductor is defined as The incomplete part of an electron pair bond.

An n-type semiconductor is ………

Last Answer : An n-type semiconductor is Electrically neutral.

The strength of a semiconductor crystal comes from ……..

Last Answer : The strength of a semiconductor crystal comes from Electron-pair bonds.

The most commonly used semiconductor is ………..

Last Answer : The most commonly used semiconductor is Silicon.

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

Last Answer : A semiconductor has Negative temperature coefficient of resistance.

Pure semiconductors silicon and germanium are a) Extrinsic b) Intrinsic c) Insulator d) Diodes

Description : Pure semiconductors silicon and germanium are a) Extrinsic b) Intrinsic c) Insulator d) Diodes

Last Answer : b) Intrinsic

Pure silicon is

Description : Pure silicon is (a) a p-type semiconductor (b) an n-type semiconductor (c) an intrinsic semiconductor (d) an extrinsic semiconductor 

Last Answer : Pure  silicon  is  an  intrinsic  semiconductor because  its  own  electrons   are  responsible   for   conduction.

Allocating extrinsic rewards for behaviour that has been previously intrinsically rewarded tends to decrease the overall level of motivation, and is called: (a) Reward Evaluation Theory ; (b) Extrinsic Evaluation Theory ; (c) Cognitive Evaluation Theory (d) Intrinsic Evaluation Theory

Description : Allocating extrinsic rewards for behaviour that has been previously intrinsically rewarded tends to decrease the overall level of motivation, and is called: (a) Reward Evaluation Theory ; (b) Extrinsic Evaluation Theory ; (c) Cognitive Evaluation Theory (d) Intrinsic Evaluation Theory 

Last Answer :  (c) Cognitive Evaluation Theory

What is an intrinsic semiconductor or pure semiconductor?

Description : What is an intrinsic semiconductor or pure semiconductor?

Last Answer : A semiconductor in which the number of holes and electrons are equal is called intrinsic orpure semiconductor.