Consider the RL circuit shown in the figure where R 40 and

Consider the RL circuit shown in the figure, where R = 4.0 and L = 6.0 H. How much energy is stored in the inductor after the switch has been closed a long time? J

Solution

After long time,
I = V/R
= 9 / 4
=2.25 A

E = 0.5*L*I^2
= 0.5*6*(2.25)^2
=15.2 J
Answer: 15.2 J