An inductor initially has 3 A of current passing through it at time t = 0. The current through the inductor increases at a constant rate until 5 A of current is flowing through it 1s later at t = 1 s. The voltage across the inductor is 4 μV while the current is increasing. What is the increase in the energy stored in the inductor between t = 0 and t = 1 s?
Answer: 16 μJ
The Attempt at a Solution
I can use U=1/2 I^2L to find the energy? But how enery increased? And how can I find current over inductor?