A capacitor is connected in series with a resistor to a constant-voltage source

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A 4.0 μF4.0\,\mu\text{F} capacitor is connected in series with a 1.5 kΩ1.5\,\text{k}\Omega resistor to a constant-voltage source. Approximately how long after the switch is closed will the capacitor first reach 63%63\% of its final charge? (a) 4.1 ms4.1\,\text{ms} (b) 30 ms30\,\text{ms} (c) 6.0 ms6.0\,\text{ms} (d) 2.8 ms2.8\,\text{ms}

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