The resultant magnetic momentum in an atom of the diamagnetic material is ______.

Concept:

Diamagnetic Substance:

• Diamagnetic substances are those which develop feeble magnetization in the opposite direction of the magnetizing field.
• Such substances are feebly repelled by magnets and tend to move from stronger to weaker parts of a magnetic field.
• Magnetic susceptibility is small and negative i.e. -1 ≤ X ≤ 0.
• Examples: Bismuth, copper, lead, zinc, etc.

Explanation:

From the above explanation, we can see that when diamagnetic material is placed in an external magnetic field the magnetic dipoles of the diamagnet  will be aligned in the opposite direction of the applied magnetic field

Hence the net magnetic moment will always be zero for a diamagnetic material when subjected to an external magnetic field.