일반물리학 2 — Circuits: Problem 26

26 A 15.0 kΩ resistor and a capacitor are connected in series, and then a 31.0 V potential difference is suddenly applied across them. The potential difference across the capacitor rises to 7.00 V in 1.30 ms. (a) Calculate the time constant of the circuit. (b) Find the capacitance of the capacitor.