Define Superconductivity.

Define Superconductivity.
by

2 Answers

Answer :

The property of zero electrical resistance in some substances at very low absolute temperatures.

by

Answer :

Superconductivity is a phenomenon of exactly zero electrical resistance. 

 OR 

The property of zero electrical resistance in some substances at very low absolute temperatures called superconductivity.
by

Related questions

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.

Give various photoemissive materials and suggest relevant combination of material for LED to emit Yellow and Green colour.

Description : Give various photoemissive materials and suggest relevant combination of material for LED to emit Yellow and Green colour.

Last Answer : Various photoemmisive materials are as follows  Zinc Potassium Lead sulphate Sodium Cadmium sulphide Relevant combination of material for LED to emit Yellow colour  1. Gallium Phosphide(GaP) ... 1. Gallium Phosphide(GaP) 2. Aluminum Gallium Indium Phosphide 3. Aluminum Gallium Phosphide

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

Explain seekback effect and give its two applications.

Description : Explain seekback effect and give its two applications.

Last Answer : Diagram: Explanation:- Thermoelectric effect also called as seeback effect.  Principle: When two dissimilar metals are connected with each other at their ends a ... thermoelectric generators with the same mechanism but using radioisotopes to generate the required heat difference. 

Explain the concept of piezo-electricity and give its two applications.

Description : Explain the concept of piezo-electricity and give its two applications.

Last Answer : Concept of piezoelectricity:- The phenomenon in which production of polarization, takes place when mechanical stress is applied. Piezoelectricity is a special property of certain material which ... ceramics as oscillators that generate predictable and stable signals at RF (radio frequencies)

Explain the requirements of good insulating material.

Description : Explain the requirements of good insulating material.

Last Answer : Requirement of good insulating material are: i) Electrical ii) Mechanical iii) Thermal iv) Chemical (i) Electrical requirement: A good insulating material should have high resistivity and low ... alkalies. It should not absorb water as water reduces insulation resistance and dielectric strength.

Explain the concept of field emission and give its two applications.

Description : Explain the concept of field emission and give its two applications. 

Last Answer : Concept of field Emission:- Electric field electron emission is the process by which free electrons are emitted from the metal surface when strong electric field is applied. Electric field ... power amplifiers 3. Parallel e-beam lithography tools 4. Electron guns for electron microscopes.

State any four applications of micrometers.

Description : State any four applications of micrometers. 

Last Answer : It is used to measure the teeth of gears accurately. This instrument is used to check round work pieces accurately It is also used to check wall thickness of the pipes It is ... It is used in telescopes or microscopes to measure the apparent diameter of celestial bodies or microscopic objects.

List any two applications of thermionic emission.

Description : List any two applications of thermionic emission.

Last Answer : 1. The components which are made by the process of thermionic emission are used in the electronic devices such as cathode ray tube, radio etc.  2. Thermionic emission are used in a ... , power electronics, x-ray generation, and energy converters from high-temperature sources and solar energy.

Give any two properties of polymers.

Description : Give any two properties of polymers.

Last Answer : Properties of polymers:- 1. It can be molded. 2. It has ability to soften and even melt.

Superconductivity means

Description : Superconductivity means

Last Answer : current without facing any resistancce

Superconductivity is a material property associated with - (1) cooling a substance without a phase change (2) frictionless liquid flow (3) a loss of thermal resistance (4) a loss of electrical resistance

Description : Superconductivity is a material property associated with - (1) cooling a substance without a phase change (2) frictionless liquid flow (3) a loss of thermal resistance (4) a loss of electrical resistance

Last Answer : (3) a loss of thermal resistance Explanation: Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic flux fields occurring in certain materials, called superconductors.

Nuclear reactors used to produce electricity are based on – (1) Nuclear fission (2) Nuclear fusion (3) Cold fusion (4) Superconductivity

Description : Nuclear reactors used to produce electricity are based on – (1) Nuclear fission (2) Nuclear fusion (3) Cold fusion (4) Superconductivity

Last Answer : (1) Nuclear fission Explanation: A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. Most commonly they are used for generating electricity and for the propulsion ... (water or gas), which runs through turbines that power either ship's propellers or generators.

Write short notes on any two of the following : a. Superconductivity b. Night Vision Technology c. Seismograph

Description : Write short notes on any two of the following : a. Superconductivity b. Night Vision Technology c. Seismograph

Last Answer : a. Superconductivity The pairing of electrons in certain materials when cooled below a critical temperature, causing the material to lose all resistance to electricity flow. Superconductors can carry ... for measuring the intensity of earthquakes by recording the seismic waves that they generate.

What is meant by superconductivity?

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

The magnetic field which destroys the superconductivity is called a) Diamagnetic field b) Ferromagnetic field c) Ferrimagnetic field d) Critical field

Description : The magnetic field which destroys the superconductivity is called a) Diamagnetic field b) Ferromagnetic field c) Ferrimagnetic field d) Critical field

Last Answer : d) Critical field

Name the three American physicists who received the Nobel Prize in 1972 for their development of a theory of superconductivity.

Description : Name the three American physicists who received the Nobel Prize in 1972 for their development of a theory of superconductivity. 

Last Answer : ANSWER: (JOHN) BARDEEN, (LEON N.) COOPER, (J. ROBERT) SCHRIEFFER 

Nuclear reactors used to produce electricity are based on (1) nuclear fission (2) nuclear fusion (3) cold fusion (4) superconductivity

Description : Nuclear reactors used to produce electricity are based on (1) nuclear fission (2) nuclear fusion (3) cold fusion (4) superconductivity

Last Answer : nuclear fission

Superconductivity is a material property associated with

Description : Superconductivity is a material property associated with

Last Answer : Superconductivity is a material property associated with A loss of electrical resistance

The superconductivity is due to

Description : The superconductivity is due to

Last Answer : The superconductivity is due to the crystal structure having no atomic vibration at 0°K.

Superconductivity is observed for?

Description : Superconductivity is observed for?

Last Answer : Superconductivity is observed for d.c. and low frequency.