# Homework Help: A type 2 superconductor is placed in a small magnetic field

1. Nov 7, 2011

### mkbh_10

A flux quantum is approx. equal to 2*(10)^(-7) gauss cm*cm. A type 2 superconductor is placed in a small magnetic field which is then slowly increased till the field starts penetrating the superconductor. THe strength of the field at this point is 2/pi*(10)^(5) gauss.

The penetration depth is

100 Angstrm
10 angstrm
1000 angstrm
314 angstrm

The applied field is further increased till superconductivity is completely destroyed. The strength of field is 8/pi*(10)^5 gauss. The correlation length of superconductor is

20 A
200 A
628 A
2000 A