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Theory:

The materials are classified based on their behaviour in a magnetic field as:
  1. Diamagnetic materials
  2. Paramagnetic materials
  3. Ferromagnetic materials
The characteristics of these materials are as follows.
Diamagnetic materials:
  • Diamagnetic materials can align themselves perpendicular to the magnetic field's direction when suspended in an external uniform magnetic field.
  • They migrate away from the stronger part and move toward the weaker part when suspended in a non-uniform magnetic field.
  • They are magnetised in the opposite direction of the magnetic field.
  • The external temperature does not affect the magnetic properties of these substances.
Example:
Water, air, and hydrogen are diamagnetic in nature. Some other diamagnetic materials are also listed below in the table.
 
Metals
Image
BismuthBismuth_(Pennsylvanian_to_Early_Permian;_Wolfram_Camp,_Queensland,_Australia)_2.jpg
Coppercopper-390813__340.jpg
Mercury512px-Elemental_mercury.jpg
Goldbullion-1744773__340.jpg
Alcohol
science-chemicals-black-light.jpg
Reference:
https://upload.wikimedia.org/wikipedia/commons/e/e4/Bismuth_%28Pennsylvanian_to_Early_Permian%3B_Wolfram_Camp%2C_Queensland 2C_Australia%29_2.jpg
https://live.staticflickr.com/5009/5351056906_64c19be807_n.jpg
https://p0.piqsels.com/preview/517/899/620/science-chemicals-black-light.jpg
https://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Elemental_mercury.jpg/512px-Elemental_mercury.jpg