RC Circuit Resistor Voltage
A series RC circuit consists of a 12.0 V battery, a 6.0 μF capacitor, and a 2.0 MΩ resistor. At what time after the switch is closed does the potential difference across the resistor equal 4.0 V?
A
τ/3, where τ is the time constant
B
τ ln(3), where τ is the time constant
C
3τ, where τ is the time constant
D
τ ln(2), where τ is the time constant
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