Making a Superconductor at Home or School!!

1. The Study Sr. Secondary School Badi, Udaipur Project to be submitted for the partial fulfillment of CBSE, Class XII, Practical Examination 2006-07 Recipe Of A Superconductor Submitted by: Kartik Gupta Submitted to: Mrs. Geetha Nair

3. Certificate This is to certify that Mr. Kartik Gupta of Class XII has satisfactorily completed the course of experiments and the project report in practical Chemistry prescribed by the Central Board of Secondary Education in the laboratory of The Study Senior Secondary School, Udaipur in the year 2006-07 . Date : Signature of the Teacher-in-charge Signature of the Principal

6. Recipe Of A Superconductor Above: Crystal structure of YBa 2 Cu 3 O 7 - the so-called "1-2-3" superconductor

12. Graph Showing sudden drop in resistivity when the temperature of mercury is lowered to 4.5 K.

14. Above: The Meissner effect - a superconducting sphere in a constant applied magnetic field excludes the magnetic flux.

17. Superconductivity Theory - Background

19. Above : The Drude model : approximates the metal to a lattice of cations through which delocalised electrons flow.

20. For our purposes, it is necessary to adopt a modified instance of the Drude model, whereby the electrons are assumed to have zero electrical potential between the cations, but near the cations the potential is negative - that is, the free electron approximation outlined above is not adopted. Above: Abandoning the free electron approximation: the potential is negative near the cations and zero in the region between ions.

22. Above: Lattice distortion: around an electron causes an increase in positive charge density that will propagate along the lattice with the cation vibrations.

23. Recipe Of A Superconductor Making your own Superconductors

42. The Study Sr. Secondary School Badi, Udaipur