# RC charging circuit

A 5 $$\text{F}$$ capacitor is connected in series to a 4 $$\text{V}$$ battery, a 3 $$\Omega$$ resistor, and a switch. What is the charge on the capacitor, in $$\text{C}$$, when the switch has been closed for $$15 \ln10 \text{ s}$$?

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