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

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

1 Answer

Answer :

d) Insulating
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Related questions

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 suitable impurities into semiconductor, is called – (1) Doping (2) Mixing (3) Forming (4) Diluting

Description : Addition of suitable impurities into semiconductor, is called – (1) Doping (2) Mixing (3) Forming (4) Diluting

Last Answer : (1) Doping Explanation: In semiconductor production, doping refers to the introduction of impurities into an extremely pure intrinsic semiconductor for the purpose of modulating its electrical properties. ... type of semiconductor and the properties that it needs to have for its intended purpose.

Addition of suitable impurities into semiconductor, is called (1) Doping (2) Mixing (3) Forming (4) Diluting

Description : Addition of suitable impurities into semiconductor, is called (1) Doping (2) Mixing (3) Forming (4) Diluting

Last Answer : Doping

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.

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.

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.

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.

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

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

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.

What is doping?

Description : What is doping?

Last Answer : Doping intentionally introduces impurities into an extremely pure (also referred to as intrinsic) semiconductor for the purpose of modulating its electrical properties. The impurities are dependent upon the ... that it acts more like a conductor than a semiconductor is referred to as degenerate.

Which of the following properties distinguish a material as conductor, insulator and semiconductor? a) Free electron charges b) Fermi level after doping c) Energy band gap d) Electron density

Description : Which of the following properties distinguish a material as conductor, insulator and semiconductor? a) Free electron charges b) Fermi level after doping c) Energy band gap d) Electron density

Last Answer : c) Energy band gap

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

The impurity of mixing water which affects the setting time and strength of concrete, is (A) Sodium sulphates (B) Sodium chlorides (C) Sodium carbonates and bicarbonates (D) Calcium bicarbonates

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Last Answer : Answer: Option C

A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT

Description : A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT

Last Answer : Ans: BJT and MOSFET

In a semiconductor diode, p-side is earthed and to n-side is applied a potential of -2 volt; the diode shall (a) Conduct (b) Not conduct (c) Conduct partially (d) Break down

Description : In a semiconductor diode, p-side is earthed and to n-side is applied a potential of -2 volt; the diode shall (a) Conduct (b) Not conduct (c) Conduct partially (d) Break down

Last Answer : a) Conduct

The reverse current through semiconductor diode is due to (a) Minority carrier (b) majority carrier (c) electrons (d) holes

Description : The reverse current through semiconductor diode is due to (a) Minority carrier (b) majority carrier (c) electrons (d) holes

Last Answer : (a) Minority carrier

Semiconductor germanium and silicon are (a) Pentavalent (b) trivalent (c) divalent (d) tetravalent

Description : Semiconductor germanium and silicon are (a) Pentavalent (b) trivalent (c) divalent (d) tetravalent

Last Answer : (d) tetravalent

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

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

indicate the false statement.TheSWRon a transmissionline isinfinity;the line isterminated in a. a short circuit b. acompleximpedance c. an open circuit d. a pure reactance

Description : indicate the false statement.TheSWRon a transmissionline isinfinity;the line isterminated in a. a short circuit b. acompleximpedance c. an open circuit d. a pure reactance

Last Answer : b. acompleximpedance

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

In addition to undercutting the mica, proper maintenance of a D.C. motor's commutator includes _______________. A. side-cutting the copper segments and insulating the slots B. coating the copper surface with light machine oil for the first four hours of operation C. baking the armature in an oven at a maximum of 95°C for not over 8 hours D. all of the above

Description : In addition to undercutting the mica, proper maintenance of a D.C. motor's commutator includes _______________. A. side-cutting the copper segments and insulating the slots B. coating the copper surface with light machine ... in an oven at a maximum of 95°C for not over 8 hours D. all of the above

Last Answer : Answer: A

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. (A) Chromium (B) Arsenic (C) Copper (D) Manganese

Description : Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. (A) Chromium (B) Arsenic (C) Copper (D) Manganese

Last Answer : (C) Copper

Steps taken by the Government of India to control air pollution include (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons (b) permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles (c) use of non-polluting compressed natural gas (CNG) only as fuel by all buses and trucks (d) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Description : Steps taken by the Government of India to control air pollution include (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and ... trucks (d) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Last Answer : (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons

If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero (A) Enthalpy (B) Volume (C) Both 'a' & 'b' (D) Neither 'a' nor 'b'

Description : If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero (A) Enthalpy (B) Volume (C) Both 'a' & 'b' (D) Neither 'a' nor 'b'

Last Answer : (C) Both 'a' & 'b'

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.

What is the name given to a piece of pure semiconductor material that has an equal number of electrons and holes?

Description : What is the name given to a piece of pure semiconductor material that has an equal number of electrons and holes?

Last Answer : Intrinsic.

A pure semiconductor under ordinary conditions behaves like (A) a conductor. (B) an insulator. (C) a magnetic material. (D) a ferro-electric material.

Description : A pure semiconductor under ordinary conditions behaves like (A) a conductor. (B) an insulator. (C) a magnetic material. (D) a ferro-electric material.

Last Answer : (B) an insulator.

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

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

Process Who Say ?

Last Answer : Operating Of the system Of work Basic Single Who Process Says.

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Last Answer : a.separatinglightinto its componentfrequencies

Laser beams can generate three dimensional images of objects in a process called a) polygraphy b) telegraphy c) holography d) autography

Description : Laser beams can generate three dimensional images of objects in a process called a) polygraphy b) telegraphy c) holography d) autography

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The reverse process of photo-electric effect is called: a) Annihilation of matter b) Compton effect c) Pair production d) X-rays

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Last Answer : (a) during the manufacturing process

Process of conversion low voltage to high voltage is called _______ (a) Rectification (b)forward bias (c) reverse bias (d) amplification

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Last Answer : (d) amplification

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Last Answer : (b) rectification

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Silver is refined by cupellation process, the process removes the impurity of:

Description : Silver is refined by cupellation process, the process removes the impurity of:

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In a hot water heating system, there is cylindrical pipe of length 28 m and diameter 5 cm. Find the total radiating surface in the system. -Maths 9th

Description : In a hot water heating system, there is cylindrical pipe of length 28 m and diameter 5 cm. Find the total radiating surface in the system. -Maths 9th

Last Answer : Height of cylindrical pipe = Length of cylindrical pipe = 28m Radius of circular end of pipe = diameter/ 2 = 5/2 cm = 2.5cm = 0.025m Now, CSA of cylindrical pipe = 2πrh, where r = radius and h = height of ... = 2 (22/7) 0.025 28 m2 = 4.4m2 The area of the radiating surface of the system is 4.4m2.

Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:

Description : Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:

Last Answer : Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as ... effect C. Green house effect D. Solar effect.

Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:

Description : Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:

Last Answer : Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known ... effect C. Radioactive effect D. Green house effect.

Rate of cooling depends on the (1) Temperature difference between the body and the surroundings (2) Nature of the radiating surface (3) Area of the radiating surface (4) All of these

Description : Rate of cooling depends on the (1) Temperature difference between the body and the surroundings (2) Nature of the radiating surface (3) Area of the radiating surface (4) All of these

Last Answer : (4) All of these Explanation: Newton's Law of Cooling states that the rate of temperature of the body is proportional to the difference between the temperature of the body and that of the ... Specific heat of the radiating body; Temperature of radiating body and ♦ Temperature of the surrounding.

In the case if Marconi antenna, the actual length if the radiating element is A. one-half wavelength B. one-quarter wavelength C. one wavelength D. one-eight wavelength

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Last Answer : B. one-quarter wavelength

What is a dummy antenna? A. One which is used as a reference for gain measurements B. And antenna used for hand-held radio C. An non-directional transmitting antenna D. A non-radiating load for a transmitter used for testing

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Last Answer : D. A non-radiating load for a transmitter used for testing

The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoff’s law. (A) Wavelength of radiation (B) Nature of the body (C) Temperature of the body (D) None of these

Description : The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoff’s law. (A) Wavelength of radiation (B) Nature of the body (C) Temperature of the body (D) None of these

Last Answer : (C) Temperature of the body

Solid angle subtended by the finite surface at the radiating element is (A) Called the view factor (B) Called the angle of vision (C) Proportional to the square of the distance between surfaces (D) Expressed in terms of radians

Description : Solid angle subtended by the finite surface at the radiating element is (A) Called the view factor (B) Called the angle of vision (C) Proportional to the square of the distance between surfaces (D) Expressed in terms of radians

Last Answer : (B) Called the angle of vision

Pick out the correct statement. (A) Higher is the temperature of the radiating body, higher is the wavelength of radiation (B) Logarithmic mean area is used for calculating the heat flow rate through a thick walled cylinder (C) The wavelength corresponding to maximum mono-chromatic emissive power increases with rise in temperature (D) Solid angle subtended by the finite surface at the radiating element is called the angle of incidence

Description : Pick out the correct statement. (A) Higher is the temperature of the radiating body, higher is the wavelength of radiation (B) Logarithmic mean area is used for calculating the heat flow rate ... ) Solid angle subtended by the finite surface at the radiating element is called the angle of incidence

Last Answer : (B) Logarithmic mean area is used for calculating the heat flow rate through a thick walled cylinder