Permanent magnets are made of

Options :
  1. cobalt
  2. aluminium
  3. steel
  4. none of these

Answer and Explanation :-

Answer: Option 3


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More questions and answers on Indian History :-

I see at last that all the knowledgeI wrung from the darkness-that the darkness flung me-Is worthless as ignorance: nothing comes from nothing,The darkness from the darkness. Pain comes from the darknessAnd we call it wisdom. It is pain.
-Randall Jarrell The Complete Poems