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what is the work done by magnetic force of a magnet on another (permanent) magnet in displacing it through a distance d? assume whatever have to suppose such as their magnetic field B1 & B2 etc. Plz xpln.
force between two magnetic charges is given by F= km1m2/r2
here k is constant whose value is u/4pi,m1,m1 are magnitudes of magnetic moment of bar magnet..
if two magnetic charges of same polarity means north towards north are placed then they repel by F amount of force ...
now work done in moving a magnetic charge m is F.dr
W=F.dr
W =Fdrcos@ or Fdr if force is in the direction of displacement
W =-km1m2/r ........
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