The magnetic field of a bar magnet resembles most closely the magnetic field of

Options :
  1. a straight wire carrying a direct current
  2. a straight wire carrying an alternating current
  3. a wire loop carrying an alternating current
  4. a wire loop carrying a direct current


Answer and Explanation :-

Answer: Option 4

Explanation:

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Hope is the thing with feathersThat perches in the soul,And sings the tune without the wordsAnd never stops at all
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