A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil ?

Explanation

emf induced in second coil is,
`epsilon_2=-(dphi_2)/(dt)=-M(dI_1)/(dt) " " (because Phi_2=MI_1)`
`therefore dphi_2=M(dI_1)`
`therefore Deltaphi_2=M(DeltaI_1)`
`therefore Deltaphi_2=(1.5)(20)=30` Wb