Which of the following materials become highly magnetized when placed in an external magnetic field ?

Key Points

• Ferromagnetic substances are materials that become highly magnetized when placed in an external magnetic field.
• These materials have a large number of unpaired electrons that align parallel to the applied magnetic field, leading to a strong attraction to the field.
• Examples of ferromagnetic substances include iron, cobalt, and nickel.
• The phenomenon of ferromagnetism is due to the parallel alignment of magnetic moments resulting in a strong internal magnetic field.

Additional Information

• Paramagnetic substances are weakly attracted to an external magnetic field and do not retain magnetic properties when the external field is removed.
• Diamagnetic substances are materials that create an induced magnetic field in a direction opposite to an externally applied magnetic field and are repelled by the magnetic field.
• Non-magnetic substances do not exhibit any magnetic properties and are not attracted to a magnetic field.
• Ferromagnetic materials are widely used in various applications such as in transformers, inductors, magnetic storage media, and electric motors.