What is an intrinsic semiconductor or pure semiconductor?

1 Answer

Answer :

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

Related questions

Description : What is a semiconductor diode or junction diode?

Last Answer : A diode is a single crystal of semiconducting material which is doped one side with a donor impurity and the other side with acceptor impurity.

Description : Explain the formation of a p-type semiconductor.

Last Answer : When a small amount of a trivalent impurity like Boron, Indium, Aluminium or Gallium is added to a tetra valant element like Silicon or Germanium, three electrons of each impurity atoms ... and becomes n-type semiconductor. In an ntype semiconductor the majority charge carriers are holes.

Description : Explain the formation of an n-type semiconductor.

Last Answer : When a small amount of a penta valant impurity like antimony, arsenic or phosphorous is added to a tetra valant element like Silicon or Germanium, four out of five electrons of each impurity ... becomes an n-type semiconductor. In an n-type semiconductor the majority charge carriers are electrons.

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.

Description : What is material used in making semiconductor?

Last Answer : Silicon & Germanium are the raw materials used for making semiconductor. Semiconductors are located between conductors & insulators in the resistivity spectrum & allow current to flow only under certain conditions. 

Description : What is the effect of temperature on an intrinsic semiconductor?

Last Answer : An intrinsic semiconductor is basically a pure semiconductor, though some might argue that a small amount of doping can still yield an intrinsic semiconductor. In the crystal structure of ... semiconductor has a positive temperature coefficient. More heat, more conduction under the same conditions.

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.

Description : Which of the listed conditions describes the effect on intrinsic semiconductor operation as a result of a temperature increase? A. Additional heat sinks will be required B. Conductivity will increase C. Conductivity will decrease D. Resistivity will increase

Last Answer : Answer: B

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.

Description : It is the made from semiconductor material such as aluminum-galium-arsenide or gallium-arsenide-phosphide. A. APD B. Injection laser diode C. Light emitting diode D. Positive-intrinsic-negative

Last Answer : C. Light emitting diode

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

Last Answer : b) Intrinsic

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

Last Answer : (A) extrinsic semiconductor.

Description : C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because (1) The four bonding electrons in the case of C ... the case of C lie in the second orbit, whereas in the case of Si they lie in the third

Last Answer : (4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third

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

Description : State the impurities for obtaining p-type and n-type semiconductor from intrinsic semi conductor. 

Last Answer : Crystals of Silicon and Germanium are doped using two types of dopants:  1. The impurities for obtaining n-type semiconductor from intrinsic semiconductor are pentavalent impurity; like Arsenic (As), Antimony ... semiconductor are trivalent impurity; like Indium (In), Boron (B), Aluminum (Al), etc.

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.

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

Description : Why is an intrinsic semiconductor doped?

Last Answer : Intrinsic semiconductor is doped in order to increase conductivity of semiconductor. Doping increases majority charge carries either electrons or holes and majority charge carriers responsible for electric current. 

Description : Define (i) Intrinsic semiconductor (ii)Fermi energy level  

Last Answer : (i) Intrinsic semiconductor: The semiconductor in extremely pure form is called as intrinsic semiconductor.  (ii) Fermi energy level : The energy difference between conduction band and valence band is called as fermi energy level.

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 

Description : n-type semiconductor can be made by adding ____ to intrinsic semiconductor (A) Boron (B) Arsenic (C) Carbon (D) Germanium

Last Answer : n-type semiconductor can be made by adding Arsenic to intrinsic semiconductor

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.

Description : Intrinsic semiconductor material is characterized by a valence shell of how many electrons? a) 1 b) 2 c) 4 d) 6

Last Answer : Intrinsic semiconductor material is characterized by a valence shell of 4 electrons.

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

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

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

Last Answer : At room temperature, the current in an intrinsic semiconductor is due to holes and electrons.

Last Answer : The semiconductor of purest form are called intrinsic semiconductor, (eg. Silicon and germinium) where as semiconductor made up by doping of other semiconductor called extrinsic semiconductor.(again extrinsic semiconductor classified as N type n P type semiconductor) 

Description : Intrinsic Semi-conductor is also known as-----? A. Impure-Conductor B. Pure-Conductor (Answer) C. Simple Conductor D. None of these

Last Answer : B. Pure-Conductor (Answer)

Description : Silica (pure glass) fibers are used because of their low intrinsic material absorption at the wavelengths of operation. This wavelength of operation is between two intrinsic absorption regions. What are these two regions called? What are the wavelengths of operation for these two regions?

Last Answer : Ultraviolet absorption region (below 400 nm) and infrared absorption region (above 2000 nm).

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

Last Answer : b) Intrinsic

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.

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

Last Answer : d) Insulating

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.

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.

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

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

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

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

Description : Mention the uses of superconductors.

Last Answer : a) Superconductors are used in powerful electromagnets. b) High temperature super conductors are used in microwave devices. c) Superconductor magnets are used in Magnetic Resonance Imaging (MRI)

Description : What is the most important feature of a superconductor?

Last Answer : The most important feature of a superconductor is that once current is setup in a superconductor ring, it will continue indefinitely even if the battery connected is switched off.

Description : What is critical temperature?

Last Answer : The temperature below which material becomes superconductor is called critical temperature.

Description : What are superconductors? Give example.

Last Answer : The materials which show property of superconductivity are called superconductors. Example: Mercury, oxide of compound of Lanthanum, Barium and copper.

Description : What is meant by superconductivity?

Last Answer : The property by which certain materials show almost zero resistance at a very low temperature is called superconductivity. Ex: The resistance of mercury drops abruptly to zero at 4.2K

Description : What is an oscillator?

Last Answer : Oscillator is a device to produce electric oscillations of a desired frequency.

Description : Mention the applications of transistor.

Last Answer : a) Transistor is used in amplifier. b) It is used in oscillator. c) It is used in switching circuits.

Description : Write the principle of a transistor or amplifier.

Last Answer : A small change in the input signal (voltage) results a large change in the output signal (voltage).

Description : Write about the biasing of a transistor.

Last Answer : Emitter base junction is forward biased while collector base junction is reverse biased.

Description : Name the types of transistor.

Last Answer : a) Bipolar Junction Transistor (BJT) b) Field Effect Transistor (FET) c) Metal Oxide Semiconductor Field Effect Transistor (MOSFET) d) Junction Effect Transistor (JET)

Description : Write the functions of the tree regions of a transistor.

Last Answer : a) Emitter: It is of moderate size and heavily doped. It emits large number of majority carriers for the flow of current through the transistor. b) Base: It is the central region of the ... larger in size compared to emitter. It collects a major portion of majority carriers supplied by the emitter.