Physics - EMI/AC Question with Solution | TestHub

There will be three situations,

(i) When the coil is entering into the field, flux increases and from Lenz's law the induced emf or current opposes the change. Therefore$a<g$.

(ii) When the coil is completely within the field, flux remains constant and hence no emf is induced. Therefore$a=g$.

(iii) When the coil is coming out from the field, flux decreases and from Lenz's law the induced emf or current opposes the change. Therefore$a<g$.