일반물리학 2 — Induction and Inductance: Problem 15

15 A coil is connected in series with a 23.0 kΩ resistor. An ideal 50.0 V battery is applied across the two devices, and the current reaches a value of 2.00 mA after 5.00 ms. (a) Find the inductance of the coil. (b) How much energy is stored in the coil at this same moment?