1. The problem statement, all variables and given/known data 2. Relevant equations afaik, flux in inductor = Li. at t=0, current through L is 0. so change of flux = LΔi = L(i-0)=Li 3. The attempt at a solution at t=∞, i through cap. is 0. so, i get the following equations: 5(i1+i2)=20 5(i1+i2)+ 5i2=10 i get i2=-2 and i1 = 6 i through indctor = i1+i2 = 4 so, flux=Li= 0.5*4=2 book's ans. is different.