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?

Thus, the change of flux linkage is 30 Wb.

Explanation:

Given, mutual inductance of coil

M= 1.5 H

Current change in coil dI=20-0=20A

Time taken in change  dt=0.5s

Induced emf in the coil

e=MdIdt=dϕdtor,dϕ=M.dI=1.5×20dϕ=30Wb

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