일반물리학 2 — Capacitance: Problem 40

40 Capacitor 3 in Fig. 25-36a is a variable capacitor (its capacitance \(C_3\) can be varied). Figure 25-36b gives the electric potential \(V_1\) across capacitor 1 versus \(C_3\). The horizontal scale is set by \(C_{3s} = 12.0 \mu\text{F}\). Electric potential \(V_1\) approaches an asymptote of 8.0 V as \(C_3 \to \infty\). What are (a) the electric potential \(V\) across the battery, (b) \(C_1\), and (c) \(C_2\)?