You connect a battery, resistor, and capacitor as in Fig. 26.20a, where R = 12.0 Ω and C= 5.00 × 10−6F. The switch S is closed at t = 0. When the current in the circuit has magnitude 3.00 A. the charge on the capacitor is 40.0 × 10−6C. (a) What is the emf of the battery? (b) At what time t after the switch is closed is the charge on the capacitor equal to 40.0 × 10−6C? (c) When the current has magnitude 3.00 A. at what rate is energy being (i) stored in the capacitor, (ii) supplied by the battery?
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