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Q.

Which of the following options is correct to complete the given sentence?

 

A permanent magnet ________________.

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a

attracts some substances and repels others

b

attracts all paramagnetic substances and repels others

c

 attracts only ferromagnetic substances

d

attracts ferromagnetic substances and repels all others

answer is A.

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Detailed Solution

  • A magnet which does not lose its magnetism after removing the influence of the magnetizing force is named a permanent magnet.
  • Few metals in nature always magnetise themselves so as to be attracted to permanent magnets. 
  • For example, iron, cobalt and nickel metals can form strong magnets and thus are attracted by permanent magnets.
  • A permanent magnet attracts only a few magnetic materials.
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