일반물리학 2 — Electromagnetic Oscillations and Alternating Current: Problem 2

2 An ac generator with emf \(\mathcal{E} = \mathcal{E}_m \sin \omega_d t\), where \(\mathcal{E}_m = 18.0 \text{ V}\) and \(\omega_d = 377 \text{ rad/s}\), is connected to a \(4.15 \text{ \mu F}\) capacitor. (a) What is the maximum value of the current? (b) When the current is a maximum, what is the emf of the generator? (c) When the emf of the generator is \(-12.5 \text{ V}\) and increasing in magnitude, what is the current?