An inductor used in a dc power supply has an inductance of 13.0 H and a resistance of 230 \Omega. It carries a current of 0.250 A.What is the energy

An inductor used in a dc power supply has an inductance of 13.0 H and a resistance of 230 Omega. It carries a current of 0.250 A.What is the energy stored in the magnetic field?At what rate is thermal energy developed in the inductor?Does your answer to part (b) mean that the magnetic-field energy is decreasing with time?