The ans to part c is current does not changebut if rail is moving away emf will

Question

The ans to part c is current does not changebut if rail is moving away emf will increase into the page and nowcurrent should flow anticlockwise to produce B upward but thisdirection is opposite of other current than my question is whydirection does not change explain please will rate life saver ! The ans to part c is current does not changebut if rail is moving away emf will increase into the page and nowcurrent should flow anticlockwise to produce B upward but thisdirection is opposite of other current than my question is whydirection does not change explain please will rate life saver !

Explanation / Answer

(a)     the induced emf is given by     = B l v        = ....... V     I = / R       = ....... A (b)     the horizontal force will be     FB = I l B           = .......N (c)     as the magnetic flux B.A is in effectdecreasing, the induced current flow through R is from b to a pointb is at higher     potential (d)     no, magnetic flux will increase through a loopto the left of ab     here counter clockwise current will flow toproduce magnetic field the current in R is still from b to a

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