Question:

The .examples of diamagnetic, paramagnetic and ferromagnetic materials are respectively:

Updated On: Oct 27, 2023
  • copper, aluininium, iron
  • aluminium, copper, iron
  • copper, iron, aluminium
  • aluminium, iron, copper
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The Correct Option is A

Solution and Explanation

Diamagnetic substances when placed in a magnetic field are feebly magnetised opposite to the direction of the magnetising field, to example copper. Paramagnetic substances when placed in a magnetic field are feebly magnetised in a direction of the magnetising field, example aluminium. Ferromagnetic substances when placed in a agnetic field are strongly magnetised in the direction of the magnetising field, example iron.
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Concepts Used:

Magnetic Properties of Materials

Magnetic Material:

Magnetic material is one that can repel or attract other materials. The process of attraction or repulsion of these materials depends on the arrangement of electrons, which is known as the magnetic moment of that material.

Diamagnetic - With regard to the susceptibility χ, a material is diamagnetic if χ is negative. These materials produce negative magnetization when they are placed in the magnetic field. When placed in a magnetic field, these diamagnetic materials are barely magnetized. Diamagnetic substances are the ones that are repelled by magnets. 

Paramagnetic - In the presence of an external magnetic field, the substances that get weakly magnetized are known as paramagnetic substances. The magnetic dipoles align along the direction of the applied field, reinforcing and enhancing the magnetic field. These substances get weakly attracted to a magnet as they tend to move from a weaker magnetic field to a stronger one. The magnetization (M) of paramagnetic materials, discovered by Madam Curie, depends on the temperature (T) and the external magnetic field B.

M = C x (B/T) 

Where M = Magnetization

C = Curie Constant

B = External magnetic field

T = Temperature

Ferromagnetic - The materials strongly attracted by the magnetic field are known as ferromagnetic materials.