Explain Properties of Paramagnetic Substances - QS Study
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Paramagnetic substances are those in which each atom or molecule has a net non-zero magnetic moment of its own.

  1. Susceptibility has a low positive value. (For example: Xm for aluminium is +0.00002).
  2. Susceptibiltity is inversely proportional to absolute temperature (i.e) X α 1/T. As the temperature increases susceptibility decreases.
  3. The relative permeability is greater than one.
  4. When placed in a non uniform magnetic field, they have a tendency to move from weaker part to the stronger part of the field. They get magnetised in the direction of the field as shown in Figure.

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  1. When suspended freely in a uniform magnetic field, they set themselves parallel to the direction of magnetic field (Figure).

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Examples: Al, Pt, Cr, O2, Mn, CuSO4 etc.