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  1. The space around a magnet where the forces of attraction or repulsion on a magnetic object can be detected is called magnetic field. 
  2. Magnetic field around a magnet or other magnetic object is visualized by magnetic field lines.
  3. Magnetic field around a magnet or other magnetic object can be displayed by iron filling patterns. 
  4. Magnetic field around a magnet or other magnetic object can be detected by a little compass needle at that point. 
  5. Small compass needle is aligned parallel to the magnetic field, with the north pole of the compass shows the direction of the magnetic field at that point. 
  6. The direction of magnetic field is from the north pole to the south pole outside the magnet. 
  7. Magnetic field exerts forces on magnetic poles, the forces on north pole is parallel to the field and the forces on the south pole is in opposite direction of $\vec B$.

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