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Superconductivity And Its Applications - Papers Online

Superconductivity And Its Applications

 Superconductivity And Its Applications

Super conductivity General properties

Observations regarding Applications

„O Super conductor are the material having almost zero resistivity and behave as diamagnetic below the super conducting transition temperature.„O Super conductors are PERFECT conductors.

„O Virtually zero electrical resistance.„O Perfect diamagnetic property.„O Critical field depends upon temperature of superconducting material.„O Heavy current effect destroys superconductivity properties.„O At very high pressure Tc is directly proportional to pressure.„O Tc is inversely proportional to square root of At.wt of the isotope of single superconductor.

„O LONDON ...

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charges

Due to deformationpositive charge increased

Electrons get attracted due toincreased positive charges

Cooper pairs formed

„O Can carry large quantities of energy without heat loss.„O Able to generate strong magnetic fields.„O Superconductors beneficial applications in medical imaging techniques.„O New superconductive films may result in miniaturization .„O Superconductors increased speed in computer chips.

„O Superconducting materials conduct current at only given temperature known as transition temperature.„O Superconductorsstill do not show up in most everyday electronics.

Principle: Persistent current in D.C voltage.Construction: A thin layer of insulators is placed between thesuperconductors. Both superconductors are connected to a battery .Working : LET US SEE THE WORKING OF JOSEPHDEVICE IN THE SUCCEEDING SLIDES.

Josephson devices

Voltage V applied acrosssuper conductor 1

Current increases due totunneling effect

„O Super ...

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PAPER DETAILS
Added: 12/17/2012 10:06:38 AM
Submitted By: mfarrukh
Category: Science & Nature
Type: Free Paper
Words: 410
Pages: 2

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