Which one of the following is not a ferromagnetic material?

[amp_mcq option1=”Cobalt” option2=”Iron” option3=”Silver” option4=”Ferric chloride” correct=”option3″]

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UPSC CDS-1 – 2024

The correct option is C) Silver.

Ferromagnetic materials are strongly attracted to magnetic fields and can be permanently magnetized. Common examples include iron, cobalt, nickel, and their alloys. Silver is a diamagnetic material, which means it is weakly repelled by a magnetic field. Ferric chloride is a paramagnetic material, which is weakly attracted by a magnetic field. Neither diamagnetic nor paramagnetic materials are classified as ferromagnetic.

Magnetic properties of materials are categorized into diamagnetism, paramagnetism, ferromagnetism, antiferromagnetism, and ferrimagnetism. The strength of the magnetic interaction and the behavior of magnetic dipoles within the material determine its category. Ferromagnetism is a cooperative phenomenon requiring a strong interaction between atomic magnetic moments.

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