The magnetic susceptibility of an ideal diamagnetic substance is

Step-by-step solution

A diamagnetic substance is characterized by the property of being repelled by a magnetic field. The magnetic susceptibility is defined by the relation M = H , where M is the magnetization and H is the magnetic field intensity. For a perfectly diamagnetic substance, the interior magnetic field B is zero, which implies B = ₀(H + M) = 0 . This leads to M = -H . Substituting this into the definition of susceptibility, we get = M H = -H H = -1 . Answer: -1