It sate that ,'' The direction of the induced current in a coil is such that it always oppose the cause which is produced by it ''. It is used to find the direction of flow of current due to induced e.m.f . The expression is ; e.m.f.= -N(ΔΦ/ΔT) where emf =induced voltage N= Number of loops. ΔΦ =change in magnetic flux ΔT=change in time -ve sign indicate opposite direction
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