North pole of a magnet can be identified by

North pole of a magnet can be identified by

  1. Another magnet having its poles marked as North poleĀ and South pole.
  2. Another magnet no matter whether the poles are markedĀ or not.
  3. Using an iron bar.
  4. Using iron filings.

Answer

North pole (or South pole) can be identified only if we have another magnet having its poles marked as North pole and South pole because only then we can see the attraction and repulsion between N-S (i.e. opposite) poles and N-N (i.e. similar) poles, respectively.

The correct option is A.