Hi: a) The flux linking a coil of 2000 turns fall from 0.25Wb to zero in 12.0s. What is the magnitude of the induced emf in the coil? emf=d(Nδ)/dt=(2000x0.25)/12=41.67v b) The current in one coil of a pair of coils changes at 0.85A/s. Calculate the induced emf in the other coil if this coil is open circuit and the mutual inductance of the pair is 400mH. Vs=-M x dip/dt=-400x10^-3 x 0.85 = -0.34V Would somebody kindly check this please?