1. The problem statement, all variables and given/known data the current through an element is i = 2t^2 - 1 Amps. if that element is a 4H inductor, what is the energy delivered to it from time t=1 to t=3. 2. Relevant equations energy in an inductor is dw = Li di 3. The attempt at a solution i = 2t^2 - 1 di = 4t dt w = L integral[ (2t^2 - 1)(4t) dt ] from 1 to 3 seconds i just want to confirm it with someone if i did it right or not. i felt like i did. thanks.