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2015-08-03T17:12:09+05:30

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There are 4 properties 
property of direction 
property of attraction
property of repulsion
fourth idont know 
1 4 1
the 4 th one is magnetic field lines do not intersect
2015-08-04T15:26:06+05:30
there are three properties
1 attraction
2 repulsion
3 direction
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