일반물리학 2 — Induction and Inductance: Problem 37

37 At $t = 0$, a battery is connected to a series arrangement of a resistor and an inductor. If the inductive time constant is $60.0\text{ ms}$, at what time is the rate at which energy is dissipated in the resistor equal to the rate at which energy is stored in the inductor’s magnetic field?