1.
Jackson's problem 5.7
2.
Solve the boundary-value problem for a (type I) superconducting sphere of
radius a ni an external magnetic field 
What is the
magnetization 
in the sphere? What is the induced dipole moment 
(in magnitude and direction)?
The magnetization is equivalent to a surface current 
, which in
this case is a real persistent surface current. Find the components of 
as a function of suitably chosen angles 
and 
Find a vector potential 
that describes the total 
outside the sphere.
3.
Jackson's problem 5.10
4.
A long hollow cylinder of inner radius a, outer radius b,
and of magnetic permeability 
is placed in a region of initial
magnetic-flux density 
, at right angles to the field.
Determine the screening factor, defined as the ratio between the field
inside the cavity and 