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Why is magnetic field line originated from the north pole of a magnet and ends with south pole?
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Why is magnetic field line originated from the north pole of a magnet ...
The arrows are the direction of force around an electric current. The lines of force are first generated inside the bar, so your question is slightly wrongly put. Also you have got cause and effect back to front as well. The north is labelled north because the lines point that way inside the bar. 

And the lines point all that way because the loops of force belong to domains, that align themselves to point the  same way.  You  probably didn't  know that metals are crystals with crystal domains. When the domains stay stuck in the aligned orientation we call that a permanent magnet.
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Why is magnetic field line originated from the north pole of a magnet and ends with south pole?
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Why is magnetic field line originated from the north pole of a magnet and ends with south pole? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Why is magnetic field line originated from the north pole of a magnet and ends with south pole? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Why is magnetic field line originated from the north pole of a magnet and ends with south pole?.
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