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10. Direction of magnetic field line is from north pole to south pole
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8.The Uniform Magnetic Field Is represented by drawing parallel and equidistant straight lines all pointing in same direction.
9.The two magnetic field lines do not intersect each other because if they do it means at the point of intersecting the compass needle is showing two different directions which are not possible.
10.It's a convention that magnetic field lines are drawn from north to south. Because we have defined the magnetic field lines to show the direction of the magnetic force on a north pole. Hence, they are defined as north to south.
11.For magnetic field we have continuous flow of charge particle.... but for magnetic field it must be in motion. Magnetic field is always perpendicular to the Electric field. hence current is flow i.e. charge is flow then magnetic field is produced.
12.A region around a magnetic material or a moving electric charge within which the force of magnetism acts.
13.Yes, there will be a magnetic force between the particals.
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