A cylindrical cavity of radius a is made off-center inside the long massive cylinder of radius b…

A cylindrical cavity of radius ais made off-center inside the long

massive cylinder of radius b > a; the axes of the cavity and of the

original cylinder are parallel. A steady electric current I, parallel to the

axes, is uniformly distributed over the cross section of the remaining

part of the cylinder. Find the direction and the magnitude of the

magnetic field in the points inside the cavity