Question

ferromagnetic substances make permanent magnet. give reason

Answer 1

because ferromagnetic substance have domain aligned in only one direction that make her magnet more powerful that's why it is permanent magnet

Answer 2

Answer:

• Ferromagnetic substances would make better permanent magnets.  
• In solid state, the metal ions of ferromagnetic substances are grouped together into small regions.
• These regions are called domains and each domain acts as a tiny magnet. In an unmagnetized piece of a ferromagnetic substance, the domains are randomly oriented.
• As a result, the magnetic moments of the domains get cancelled.
• However, when the substance is placed in a magnetic field, all the domains get oriented in the direction of the magnetic field and a strong magnetic effect is produced.  
• The ordering of the domains persists even after the removal of the magnetic field.
• Thus, the ferromagnetic substance becomes a permanent magnet.