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## Main Question or Discussion Point

the expression for the magnetic flux changing area is :

change in m.flux=B.dA

and for varying magnetic field

change in m.flux=dB.A

but for when the both is changing then what will the expression

change in m.flux=B.dA

and for varying magnetic field

change in m.flux=dB.A

but for when the both is changing then what will the expression