The magnetic susceptibility of a metrial of a rod is 299. Permeatbility of vaccum `mu_(0)`

The magnetic susceptibility is

The magnetic susceptibility of the material of rod is 499. Permeability of the vacuum is 4pixx10^(-7)Hm^(-1) . Absolute permeability of the material of the rod in H/m is

Magnetic susceptibility of vacuum is …

The magnetic susceptibility is negative for