An isolated atom of a substance has zero permanent magnetic dipole moment. When an external magnetic field is applied, its electronic orbital motion changes slightly and an induced magnetic moment appears opposite to the applied field. The substance is most likely:
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Question

An isolated atom of a substance has zero permanent magnetic dipole moment. When an external magnetic field is applied, its electronic orbital motion changes slightly and an induced magnetic moment appears opposite to the applied field. The substance is most likely:

Options

G1 Physics · Accepted Answer

Diamagnetism is an induced magnetic effect. The atom initially has no permanent magnetic dipole moment. An applied magnetic field modifies the orbital motion of electrons and produces an induced magnetic moment opposite to the applied field. Therefore, χₘ < 0 and the material is diamagnetic.